There was a community PR done against this in December 2019! It added openpgp first and moved sks-keyservers to last
Here it is: https://git.freepbx.org/projects/FREEPBX/repos/framework/pull-requests/158/diff
Here’s my comment about removing sks entirely
This could have been solved two years ago. Instead the PR was declined. No further progress was made on it