I don't remember all the particulars of a recovery but the channel type would matter, static key may be trickier than anchor... if anyone can give you an answer in 30 seconds it be Guggero in the LL slack.

Used chantools to sweep the non-HTLC output of that tx but it seems to me chantools do nothing with HTLCs. Will look into `chantools sweeptimelock` again.

There's a small chance this is fixed by https://github.com/lightningnetwork/lnd/issues/10053, planning to start looking into this more seriously if that's not the case.