I haven't tested it, but I heard people say you can, now.
I gave Eevee a Rare Candy when I first got to the early Lanakila patch, sadly it did not evolve into Glaceon.
Anyways, I kept track of when you could first get each Totem mon as I played, so here's that plus some thoughts on how they compare to the normal version. Keep in mind all Totem mons have 3 perfect IVs and a fixed (sometimes hidden) ability:
Can find the 20th sticker in Heahea City to get:
Gumshoos (US): Comes with Adaptability, which I'd argue as the best ability choice because unlike Strong Jaw it boosts Z-moves as well. You lose out on Melemele Island availability, but honestly Yungoos seems pretty bad for the entirety of it, so I'm not even sure I'd say this loss of availability is a bad thing. I'm pretty sure Z-Last Resort Adaptability Gumshoos can OHKO both Araquanid and Lurantis, though idk what the stance on move tutors will be. I think the Totem Gumshoos is better either way, though.
Raticate (UM): Comes with Thick Fat, which destroys the only credible niche this thing has (Hustle Z-moves). Not worth it.
Can find 40th sticker in Route 8 to get:
Marowak (US): Comes with Rock Head, which doesn't pay off until endgame (Flare Blitz) while the loss of Lightning Rod hurts versus Togedemaru and Guzma's Vikavolt. But, coming at level 25 does get around Marowak's infamous issue of not being able to learn Shadow Bone before the move relearner, which gives it a much stronger STAB earlier on. It's also ensured to be a Fire-type by Lurantis which obviously makes the match-up significantly better (normal Cubone evolves at level 28, unlikely without exp share - though I'm not sure what the policy on exp share ended up being). The only downside is losing a solid match-up versus the (enemy) Totem Marowak, but even with that in mind I think using the Totem Marowak is much better than a normal Cubone.
Araquanid (UM): Outside of better IVs this doesn't have any advantage over catching a Dewpider. And given that using the Totem means you don't have a Dewpider for Marowak (a good match-up for one of the hardest fights), I don't think this is worth using.
Can find 50th sticker at start of Malie City (Before Hau) to get:
Lurantis (US): Similar to Gumshoos/Yungoos. Using this instead of Fomantis means you lose out on about an island's worth of availability, but Fomantis' contributions on Akala Island seem pretty sketchy. It has a bad match-up versus every Totem fight, only rising up to an okay match-up versus Olivia. Despite the apparent type advantage, Anorith and Lileep are prepared for Grass-types and Lycanroc outclasses Fomantis pretty bad stat-wise. The big advantage is that Lurantis also comes at level 30 despite evolving at 35. Again, not sure what exp share policy is but without I was only at ~27 when reaching Malie City, which would be a lot more time to spend with Fomantis if I was using one. Overall I'd rather run with the Totem Lurantis.
Salazzle (UM): Unlike Fomantis, a normal Salandit actually has pretty good match-ups versus the Totems it's available for, though it isn't too useful for Olivia (might be able to 1v1 Lileep with Dragon Rage?). However, the big advantage of using the Totem version is that it means you don't need to find a female Salandit. Coming slightly before normal evolution level is also nice. This is the one I'm most split on, idk which is better to use.
Can find 70th sticker at Route 15 (After Totem Mimikyu) to get:
Togedemaru (US): The loss in availability is fairly small (Togedemaru is found at Blush Mountain) and Sturdy is a much better ability than Iron Barbs generally, so it comes down to how much you value having Togedemaru for the Totem Mimikyu fight. And to be fair, while it can't solo the fight, having the option to hurt Mimikyu with Iron Barbs recoil, break Disguise+Lum with Nuzzle, or hit it hard with Steel Z-moves gives it a pretty good match-up here. But overall, I think the long-term benefits of the better IVs and Sturdy of the Totem version win out.
Vikavolt (UM): Huge availability loss for a Pokemon that's generally good during those earlier times. Not worth it at all.
Can find 80th sticker by Po Town to get:
Mimikyu: There's not any notable fights between the Thrifty Megamart and Po Town, so given that the Totem version has better IVs and gets around hunting for a 5% encounter, this is easily worth using.
Ribombee/Kommo-o can't be gotten until postgame, so not going to bother commenting on them.