Gratuity payment and labour entitlements after termination

Good day!

Hope all is well.

"As our current projects are put on hold and given the current status of our company right now, we are requesting your patience and understanding that we need to extend your vacation.

We will notify you for any new projects if needed your presence. This is also to inform you that we had cancelled your flight ticket."

Sir, this is the letter from the company to my husband. Then, they are not allowing my husband to work.

Can they pay gratuity? He's working for almost 5 years in this company.