Need a wildcard for search

I’m aware of comparatively few internet search engines that particularly support wildcards, and fewer (none?) with anything approaching regular expressions.

ASC local search lacks wildcard and regex support. The search filter feature is the available option.

Google apparently has an undocumented and comparatively weak wildcard available in quoted strings though, which can be combined with the site:discussions.apple.com keyword to target its search. It requires whitespace around the wildcard though, and apparently doesn’t work embedded

Dogpile shows results for wildcards across various search engines, as well.

You can send website feedback to Apple here: Feedback - Apple.com Website - Apple

Depends on the context of your search:

Use string operators and wildcards - Apple Support

What browser?

What are you searching? Web, hard disk, file contents, SQL database, Photos? Bit more context will get you a bit more help.