Just a heads-up if you are running a SharePoint Server 2016 farms:
Mainstream support for SharePoint 2016 will end on July 13th, 2021:
Support lifecycle for SharePoint Server 2016
After this date only security fixes will be provided for SharePoint Server 2016. That means if you are running into a non security issue after July 13th which is caused by a problem in SharePoint Server 2016 that has not already been addressed before you will no longer be able to request a hotfix.
For business critical applications we recommend using fully supported products like SharePoint Server 2019.
What would be the next SharePoint On-Prem version after SharePoint Server 2019?
this is what has been announced so far: