> make sure not to sign into your Microsoft account or link it to Windows again
That's not so easy. Microsoft tries really hard to get you to use a Microsoft account. For example, logging into MS Teams will automatically link your local account with the Microsoft account, thus starting the automatic upload of all kinds of stuff unrelated to MS Teams.
In the past I also had Edge importing Firefox data (including stored passwords) without me agreeing to do so, and then uploading those into the Cloud.
Nowadays you just need to assume that all data on Windows computers is available to Microsoft; even if you temporarily find a way to keep your data out of their hands, an update will certainly change that.
That's not so easy. Microsoft tries really hard to get you to use a Microsoft account. For example, logging into MS Teams will automatically link your local account with the Microsoft account, thus starting the automatic upload of all kinds of stuff unrelated to MS Teams.
In the past I also had Edge importing Firefox data (including stored passwords) without me agreeing to do so, and then uploading those into the Cloud.
Nowadays you just need to assume that all data on Windows computers is available to Microsoft; even if you temporarily find a way to keep your data out of their hands, an update will certainly change that.