Hi Chris,
As per the description, it seems like Version column is not showing any version number in multiple of your document libraires, even though the numbers can be viewed by version history which indicates they are working well. If my understanding is correct, before there had a fixed SI about this behavior but currently, I failed to find any ongoing SI after checking in Microsoft Service Incident. Meanwhile, from my tests for you just now across my different tenants, it seems like I failed to reproduce the same scenario, could you please check the steps blow?
Locate the document library>open Document Library Settings with the gear icon>Versioning Settings>under Document Version History select Create major versions>click OK to save. Then, I go back the library>click the down-arrow beside All Documents>click Edit current view>check-on Version>click OK to save. Then, back to the library and the version numbers are showing correctly.
Hence, if you have already tried the below steps but still it is showing blank across your different site libraries and it also happens on other end users in your tenant, I suggest that you raise a free support ticket from the Microsoft 365 admin center and report the issue to the related team to get the proper and dedicated support. The support team there has more permission than us, they can help you remotely and collect logs to find out what exactly happened that caused the number loading conflict in SharePoint library Version column. They may also involve more resources to investigate the issue from the backend. This would be the most efficient way to handle this case for you and your tenant. Reference: Get support - Microsoft 365 admin | Microsoft Learn
Note: To create a support ticket, you must have Microsoft 365 admin privileges, and if you're not an admin for your Office 365 organization, contact the admin for creating a new ticket. Reference: How do I find my Microsoft 365 administrator? - Microsoft Support
Please accept my apologies and regret that I did not resolve the issue and redirected you to the related development team, but the solution to your concern can be found through the HAR logs and suggest that you raise a support ticket from the Office 365 admin center, where the related team will investigate the issue further by collecting the HAR logs.
We are redirecting it to the right support channel to solve the problem. That's why we suggest you contact your administrator or your IT department. They can create a support ticket. Once your administrator or IT contacts them, they will contact you back within 30mins to start troubleshooting at your end.
I am sorry and apologize for it.
Your understanding and patience will be greatly appreciated. I hope you stay safe and healthy!
Sincerely,
Mia | Microsoft Community Moderator