Thank you for the suggestion, it quite obviously seems a good idea. I had a look at the other discussion, too, dating back to the end of 2022 and think I missed parts of it back then. I seem to recall having only seen the discussion about a general blocking of all SVCB queries which seemed (and still seems) over the top. But your request is nonetheless a valid one IMO, see
https://github.com/pi-hole/FTL/pull/2315
for further details.
I'd be great if you could run
sudo pihole checkout ftl new/dns_resolver_arpa
and verify yourself that this is behaving as you expect it to.