Been having this same issue for weeks. Thought it was just me. Anyone have a solution yet? It seems to be impacting every microsoft product via Edge Chromium on macOS. I'm on Ventura if that helps.
Same issue here on Ventura and latest Edge Dev.
Any Azure, Azure AD, MS 365 etc pages take forever to initially load, then they refresh fine. But when i close the tab, reopen it, takes up to 1 min.
No issues on Chrome, Edge only.