[@neilrobb1wp1org Participant 3 years, 4 months ago]

Quick update as of Wednesday May 17th 2023, WordPress Support confirmed a JetPack fix has been pushed, I tested it this morning and it works. If you enable:

JetPack > Settings > Performance > Enable Site Accelerator > Speed up image load times, then bbPress Forum posts will no longer be missing and Site Accelerator will work normally as before.