What Android or Linux programs are the best to have all my email boxes in the same application?

I use different web interfaces to access Gmail, Hotmail, ProtonMail, Disroot, etc. However, I would like to use a single client to receive all my emails. Which desktop programs would you recommend for Linux, and which apps would you recommend for Android? I need them to support all of these email boxes. From what I've read around here, most people recommend Thunderbird for Linux, Mutt for power users, and K-9 Mail for Android. However, the first thing I noticed when opening K-9 Mail is that it doesn't support Hotmail accounts.