If you read the Support and Help rules you’ll read
Ubuntu questing (25.10) is still an unreleased product, even though it has [~just] reached Final/RC, so it’s not yet a on-topic in the Support and Help section.
At this stage of the process; bugs should be filed, as they’re much easier to deal with BEFORE the product is actually released; it’s what Quality Assurance testing is for!
For reporting bugs I’ll provide ReportingBugs - Community Help Wiki , and to record your Quality Assurance testing you can record it at Questing Final | Ubuntu QA and also link your bug report there, which will get the most attention from developers.