Hi!
I am not completely sure which flags your installation has, but another possibility is that I directly send to you two compiled builds, one with the patch and one without it that you could directly test. I would not send that to the lists as an installation is rather large, but I could just send you links from where you could download both of them. Then you would just need to stop the Postgres service, do a drop-in deplacement of the binaries, and start again the Postgres service.
I can try binaries in Intel server which runs Postgres 13.1. I hope its data directory is compatible with them.
Andrus.
