How do I find my old community questions

Internal search goes back less than a year. Use the site-delimited web search like Mac Jim ID shows.

You also use the search string

site:discussions.apple.com "ishac7510"

Note there is no space after the colon in "site."

Possibly, this one: Camera app pop up on my iPhone 14 Pro ran… - Apple Community

This search bring up the posts you have contributed:

https://www.google.com/search?client=safari&rls=en&q=site%3A%2F%2Fdiscussions.apple.com+ishac7510&ie=UTF-8&oe=UTF-8