Is there a native JQL (not a plugin) that returns tickets that have linked issues listed as "is blocked by" (so I can see all my blocked tickets).
All I have found is linkedIssues() but that can require a specific issue ID to search for which is entirely unhelpful.
I am using Jira Cloud 7.4.
In the core JIRA JQL functionality the closest thing you have, as you've already found out, is linkedIssues() that requires a parent Issue reference.
What you need is Adaptavist ScriptRunner, they have a function called hasLinks(). There are also a handful of other add-ons that offer this functionality but like ScriptRunner, they all cost money.
Related JIRA community question
JIRA Cloud feature request
Below query is also helpful
project = "Project ID" AND issuetype in (story, Spike) AND Sprint = "Sprint ID" AND linkedIssue in issueHistory()
