How to check if a certain fix has been released in an official Update version?

Issue

In the past I have received a fix from Liferay through a hotfix, which works fine
I'd like to know when or how to check if this code fix is included in your future docker image update/upgrade version of liferay.

First you need to know/determine the LPS Jira ticket number related to the fix
If you don't know it, you can open a Help Center ticket to that end (as much as possible, please specify the previous Help Center ticket where this was solved, and the hotfix number you received for this issue - this will help Liferay support engineers determine the LPS ticket related to the fix)
once you have the LPS number/link and can open it in Jira, look at the Fix Versions section: if the fix has been included in an Update version, that version will be listed here. If there's no Update version listed, the fix has not been included in one yet. (see attached image as an example for a fix that has been included in the 7.3 Update 27 release)