If you have followed a link from a commit status you will go to a page for the project which does not include the ignore and create jira issues link.
The URL will look something like this: https://app.snyk.io/org/[your org]/test/github/[projectID]?fromStatus=true&severityThreshold=high or https://app.snyk.io/org/[your org]/pr-checks/[prchekcID]
This page is showing you the data on the pull request branch, which is why it doesn't have the Jira and ignore functions.
Whereas the https://app.snyk.io/org/[your org]/project/[projectid] is the project in Snyk and shows the information on your default branch and so therefore has the jira and ignore.