Yeah, uSync doesn’t do this bit - the razor pages are either being added by Umbraco when the template is created (on v13 this might be true, on v16 it doesn’t do that bit).
uSync will actively try and delete those files if they are created and you using compiled razor views which is what you will be doing if you are running in Umbraco “Production” mode.
So as i understand it on v16 as tested. these files are not being created by uSync on import, although if you don’t explicitly tell it not to, the publish process (via CI/DC - dotnet publish ) will copy the views from your setup as part of the published files (even when you are using compuiled views).
see the config in this post Publishing production, views still in the 'views' folder - #3 by KevinJump to tell it not to do that thing.