Is it permissible to wash and iron personal clothes for free in the hotel, charge one's personal travel charger, and give some staff members from the guests' food and drink?

The reference for the ruling on an employee's actions is the contract concluded between them and the employer, along with related laws and instructions. What falls outside of that refers back to the customary practice in those entities, as long as it does not contradict Islamic law.

Accordingly, laundry and ironing may be done free of charge if the hotel regulations permit it; otherwise, it is not permissible.

As for travel shipping, it is permissible if authorized by the employer; otherwise, it is not.

It is not permissible to dispose of food and drink by giving it to some employees, unless laws and instructions permit it, or you are authorized by the hotel owner.