Currently, there are two wallets that support P2TR and multi-sig but I am afraid none of them are going to be useful in this case cause these two come only with a subscription so it is going to cost a few hundred bucks a year.
For multi sig try to check the
NunchukSparrow has been supporting P2TR not long after Taproot was implemented or activated but it does not have P2TR multisig but P2TR single sig. Do not be surprised if these others wallets do not support what OP was looking for. I do not think they are supporting it either. Just supporting the one for single signature.