Great feedback — this is a common scenario for consultants and MSPs. Unlike the Remote Desktop client, the Windows App currently defaults to the last used account without prompting for account selection at startup. This limits usability for users managing multiple AVD environments.
It would be a valuable enhancement for the Windows App to include an account picker on launch when multiple accounts are signed in. If only one account is present, it can default to that as it does now. This would streamline access and align the experience more closely with the legacy client.
This request aligns well with multi-tenant needs and improved UX and would be a strong candidate for the roadmap. Hopefully, Microsoft considers this as part of their ongoing UI/UX refinements.