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Cross-checked tax residency

Many countries don't even have TINs. The UAE doesn't.
This is correct, therefor banks have the option to select there is no TIN available and one can add/select the reason why no TIN is available.

Definitely banks have a list of jurisdictions that don't provide a TIN, so I believe one can assume that not providing a TIN will be accepted for some countries you are resident and for others not.

Revolut UK does not require a TIN
Full blown account provided

I have never encountered an EMI asking for a TIN, regular highstreet banks might require to provide a TIN.