Unresearched (so it's about as useful as something you read from a total stranger on the Internet . . . wait, this IS something you read on the Internet!) but what I recall of QBI CPE from what seems like a decade ago (but really is only a few years), the carryover QBI loss exists on its own.  So I think it will be applied against future QBI.

How do you track that in software?  <shrug>  Probably the same way you track suspended losses from prior passive activities converted to personal use, or from S Corp losses suspended due to lack of basis.  In other words, outside of the software.

Rick