Hi @Mike Pugh ,
based on your screenshot you are run a B1s VM.
On the Microsoft Website you can find the details here: Explore free Azure services
As you are running a related Azure VM (B1s with Windows) you can run 750 hours 1 VM or 375 hours 2 VMs per month and so on. The text is referring to "Windows". There is no version mentioned (Windows Server 20xx or Windows 10/11 ).
(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)
Regards
Andreas Baumgarten