Can't sync or send notebooks due to Account email fail.

Can't sync or send notebooks due to Account email fail.

Account @inorbit email no longer works with Mail. Please excuse the bold italics to show the common features of the issues. This has bad knock-on effects and can only work in the ipad it was set up in. This  is because the account email cannot  send. I cannot use my iphone for notebooks because I cannot sign in there. That is because I cannot verify the account as that needs a one time code OTC being sent  by email to iPhone. For the same reason I cannot send notebooks. And I cannot change my account email because I need my existing email to be sent for verification.
I can still access and create notebooks but only in the iPad I installed it in.
The initial problem also caused other emails to be culled.
Is there a way to export my notebooks and cards (eg to  microsoft 365 onedrive on my ipad, make another notebook account, then import all my notebooks into it? I think I have the password but it's the verifications that might be an issue. Or any other ideas, please? Happy New Year!

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