Mostly this is just for my own understanding.  Why wouldn't you report the 199A info for an SSTB?  From the PTE level there's no way to know the TI of the owner, so no way to know whether the info might be relevant.  Even if the PTE is passing thru $600K of income, there could still be $300K of charitable contributions at the 1040 level and a QBI deduction available on the 1040.

Rick