Locked out of my iCloud email

Have you forgotten your Apple ID?, Check your Apple ID via your email box, see this Apple article: If you forgot your Apple ID

If you forgot your Apple ID email address or phone number - Apple Support                  

OR see -> Having trouble signing in?

https://iforgot.apple.com/password/verify/appleid

Have you forgotten your password? -> See this Apple article: If you forgot your Apple ID password

If you forgot your Apple ID password - Apple Support

Then see this Apple article: What to do after you change your Apple ID or password

What to do after you change your Apple ID or password - Apple Support

and I don’t know the password for that iCloud account

Once again -> Have you forgotten your password? -> See this Apple article: If you forgot your Apple ID password

If you forgot your Apple ID password - Apple Support

Then see this Apple article: What to do after you change your Apple ID or password

What to do after you change your Apple ID or password - Apple Support

and also my number that’s linked up to the iCloud account isn’t my number and I’m not sure what number it is

See -> If you forgot your Apple ID email address or phone number

If you forgot your Apple ID email address or phone number - Apple Support

Go to -> Settings -> tap your profile -> Name, phone numbers and email

Have you tried deleting the account(s), restarting the device, and then adding the account(s) back?

Mail – Setup on a device