Motorola + GrapheneOS next year could be an alternative. So far they've been relatively insulated from the changes that have been coming down from Google.
TPM with things like Heads are borderline zero security and theater compared to actually decent implementations on Android/iOS platforms, I doubt the big companies would rely on that. TPM in general on non Mac/Chromebook PCs is mediocre even from big OEMs.
There is almost zero chance that the Motorola phones will come with a replaceable battery and likely fall under the exemption anyways. The GOS supported phones will all be flagship level devices (i.e. Signature/RAZR).