Unless AE gets massively better in audio processing that is likely a pipedream. The logic would likely be that since it is in Premiere you are supposed to use it there and then import your work into AE. Perhaps they'll create some marker stuff and the importer will honor the Remix transitions soemhow, but I wouldn't expect more than that, least of all a full native implementation.
Yeah, sure, but arguably this feature isn't meant for you, then. The effort to implement it and polish AE's audio pipeline would be unjustifiable for TikTok clips, if you get my drift, which I think is the point. If I was the product manager I sure would see it this way.