Yes, and it is free of charge, for each hosting package the option of signing the "Contract for entrusting the processing of personal data" in accordance with Art. 28 of the GDPR.
In each client panel, there is a prepared contract for entrusting the processing of personal data that can be concluded with us. The conclusion of the Agreement in accordance with the provisions of the GDPR is carried out electronically.
The contract has a convenient attachment wizard in which the data categories that the client entrusts to us for processing are given.
The GDPR agreement also contains provisions regarding the so-called "under entrusting" - if you have personal data of your clients on your hosting or reseller account. We also have a ready-made agreement that our client can contract with his clients.
More can be read at: https://www.smarthost.pl/blog/umowa-powierzenia-danych-dla-resellerow-hostingu