Update: F2Pool included their first P2TR spend (mempool.space/tx/414ef7844f2…) today in block 710269. F2Pool reached out, and we debugged the issue: Nodes are up-to-date but didn't have any >=v0.21.1 peers (due to custom patches and addnode) that relayed P2TR spends. That's fixed now.
Looking at the pools that mined more than 3 blocks since taproot activation or included a P2TR spend, it's clear that F2Pool and AntPool are, very likely, NOT including P2TR spends. F2Pool already mentioned that they will upgrade their infrastructure soon.
Nov 18, 2021 · 5:56 PM UTC
AntPool might have a similar problem. Apparently, their nodes are up-to-date and the peers too old, too (I don't know details). @bitentrepreneur has been in contact with them 🙏
antpool should be incl. P2TR very soon (hopefully, tomorrow)