Looks like MS Store jumped the gun a little and has reverted back to previous build [Version: 2.132.1053.0 64-bit (August 2024)] as an update was pushed out via store yesterday (probs around 16h00 UTC). This build still has the reported issue and can be used to test/verify issue with grey text.
Coincidently the previous build, as mentioned above and oddly (Oct 24) also included dark theme which also had tickets raised. But the reverted build pushed via the Store has no dark theme. Just by way to help anyone reading this ticket if opening a report that was created/amended/saved using the very short lived build you will get an error message when opening in the reverted build regarding a feature or component issue - not sure of exact wording. It does not appear to have caused any noticiable issues on reports. I can only see the legacy/light/dark mode option list has disappeared in settings.