A few questions to the new Outlook365 on Windows

Hey.

After many years, i switched from Office2021 to Office365, mostly because of the 1TB OneDrive storage and more up2date software.

I installed the so called "new Outlook365" desktop on my Windows computer. 

The program says: Microsoft Outlook-Version 1.2024.807.100 (Production).

I am not sure if its already a final product or a beta version 😕

I use outlook for many of my e-mails and to manage my calendar/tasks/to do lists.

My questions:

1) I added in the new Outlook365 several IMAP e-mail accounts and found nowhere a possibility to change the senders name, which is shown normally next to the e-mail adress. I changed the name in the webmail client from my webhosting account, but that didnt help either. 

--> Is it not possible in the acutally version for IMAP e-mail accounts to change the senders name?

2) How can i customize the left app bar in the new Outlook365?

I see there only a few app icons, but no option to change them or to add for example OneDrive, To Do, etc.

3) How i can integrate my To Do List & One Note from Microsoft365 in Outlook?

I have looked everywhere, but have found no option, how i can integrate them in the new outlook.

Hope the community can help to resolve my problems.

Thanks in advance.

Greets