Finally, after years with new Jira Cloud shit (it was 10+ years with almost perfect non-cloud Jira & Confluence), the dot menu starts to work, with at least some functions.
However, when you type a . dot, the opened text field already contains a dot and filters by it. To type an action and search for it, you have to first erase this dot:
Please remove the dot from the text field!
Notably, I can't add a ticket to the https://jira.atlassian.com/ anymore — it redirects to the support, and in the support, I can't submit a message, it just has a link to this community forum. It completely looks like Atlassian know they don't test the releases and produce the total shit and are afraid of real user feedback.