Occasionally, a jira ticket has a link to a pull request in bitbucket, and occasionally the other way round, so it does work.
However most tickets it does not work.
Lets say the ticket is ABC-123
We always create a branch with the ticket name, e.g.
Checkout -b feature/ABC-123
When we do a pull request, we make sure the branch name is in the first commit, and also in the description and title, e.g. "feature/ABC-123 change to do something".
However it doesnt link.
In bitbucket, the ticket name is highighted, but the link is broken.
Unfortunatley, our org has jira and bitbucket self hosted, so they are probably old versions.