Labor rights the employee can claim in case of terminating the contract by the employer

I was working in a private company registered in the mainland of Dubai for more than 4 years on an unlimited contract. My visa was due for renewal on 14 February 2022.

However, my employer has given me a 30 days' notice (as per the contract) of contract non-renewal on 17 January 2022 stating my contract will finish on 17 February 2022, although the visa expired on 14 February 2022.

I have completed 4 years and 27 days with the company.

Now my question is, will the non-renewal of the unlimited contract be considered as termination by the employer since the company has given the notice to me?

In such a case, what will be the basis for gratuity calculation?

Will it be 21 days for each completed year (since the employer issued the notice) or 14 days?