Will SharePoint patch update break all Nintex Workflow instances?

Dear Folks looking for your help based on your experience.

In my case I have a production SharePoint 2019 environment which is EOL, we were in process to implement another system well ahead based on business users requirements; however, it got delayed from the planned timeline.

In continuation to EOL we have Nintex for SharePoint which is also EOL and there is no way to procure new licenses for it.

I want to check if someone have patched (new patch released in Aug 2026) SharePoint when its EOL and Nintex production licenses are expired without failing the existing or new workflow instances.

Currently our workflows in production are working fine without giving error from Nintex about expired license; however, I seen this in our test environment where nothing is working now, i.e. new workflow creation, managing existing workflows or new instances of existing workflows, is there any difference how Nintex license works on different environment?

Also, would like to emphasize that the Nintex version on production is 5.1.X whereas 5.2.X for test. While checking online, it was mentioned that production might be working as services must not be started after EOL, but of course, I verified servers were restarted at least once since EOL.

Hence, looking for someone who can share their experience about the same scenario.