It's the IRS you need to be "dismayed" with, as it's the IRS that does not support e-filing of Schedule B. Professional preparers have to create PDFs of the form to attach in order to get them to file because the IRS system is not able to accept this form by e-file (unless TT or someone else can convince them to reprogram mid-season, which they've been able to do in the past.)
The schedule is brand new - not a revision of a prior form - and the IRS didn't release it until after the e-file system was already programmed for 2021 tax returns.
