email client – Big Sur opens gmail instead of mail app

Since my upgrade to Big Sur, the mail links in my address book open Gmail (in a chrome browser).
Default mail account is set to an iCloud account and still gmail opens.

Are there any other prefs to disable this annoying behaviour?

Besides that, MS Excel (on mac) shows a PDF in chrome after clicking “Share as pdf…”, befiore the upgrade, it opened my default mail program (apple mail in the pre-big sur era)