Updated Version of Outlook Mail (??)

Have looked at the New Version of Outlook Mail a couple months back, Apparently by Years end Microsoft will be Out with the old Version and in with the New Version.. My query is getting used to the New version and somethings are not working as they should.. Presently I have 6 email addresses listed 2 Outlook, 1 Hotmail, 1 Gmail, 1 Yahoo.com.. With the New Outlook Mail initially they were all listed and I could scroll down to the Email Address I wished to use.. That was short lived and for why I don't know.. Last time only my main Outlook email address showed , None of the others (??) I'm hesitant to Switch if there was a Bug and problem was not Fixed ?? Thoughts & Opinions Appreciated, Cheers Thanks...

New Outlook app is crapware from Microsuck at its finest. First time I tried it, through my IMAP account it couldn't even receive an important email message from a sender that happens to be the genuine mailer system of a major company that is registered on the stock exchange. The email message finally popped up 2 days later (in the spam folder, that is). Fuhgeddaboudit!

Welcome to the forum. Please advice WHICH outlook you are using. Outlook 365, Outlook 2021, or the built-in Outlook app that replaced Windows Mail. The first 2 are full fledged email applications. The third is a panned-down version with limited function.
For anyone trying to manage multiple email addresses the app is far from ideal. You might want to look into one of the free full-fledged email programs like Thunderbird. There are others.

It was the case that imap accounts couldn’t be added to Outlook Mail (the new mail app) but now that is fixed - I’ve added Gmail, Yahoo, iCloud & my isp email accounts fine.
I had to re-authorise these accounts by either entering the password/app specific password or confirming via signing into the account.
No combined inbox though but accounts can be accessed individually.

New Outlook has been in Beta for at least 8 months.

The state of play is here, seems to be updated:

Currently does not even match the existing Mail App nevermind the desktop Outlook. Not compatible with some Email Accounts and lacking in features.
As of now, not worth installing. I would wait at least 6 months.