Consolidate folder list to easily see multiple inboxes?

I am running Outlook® for Microsoft 365 MSO (Version 2407 Build 16.0.17830.20166) 32-bit on Windows 10 and have 3 Office 365 mailboxes in different organizations configured.

The problem I'm facing is I cannot see all three inbox folders in my folder list sidebar simultaneously because with all 3 mailboxes expanded, there is not enough vertical screen real estate.  Since I cannot see all 3 inboxes at the same time, I have to remember to scroll up / down in the folder list to see if there are unread messages in each inbox, and I often forget to do this and end up seeing new messages on a delay.

Inside each mailbox, there are a number of folders that I don't really need to see on a regular basis (drafts, sent items, outbox, rss subscriptions, etc.) and these take up a lot of space on the screen.  If I could somehow hide those folders, it would give me enough space back to see all of my inbox folders.

Alternately, in a perfect world, there would be some way to 'pin' folders to the top of the list, similar to how you can pin folders to the Quick Access section in Windows Explorer.

Is there some way to accomplish one or both of these ideas?  Or, is there another solution that would allow me to easily see all of my inbox folders simultaneously?