Does hydrogen os have the function of harassing calls and intercepting spam messages?

Try not to pre-install such software on the mobile phone system.

Pre-installed software is relatively basic and its management ability is not outstanding.

I suggest you try Tencent Mobile Manager.

Because the housekeeper's user base is relatively large, basically the harassing phone numbers received at ordinary times will be marked by users, which is convenient for rejection or interception:

Open Tencent mobile phone housekeeper-harassment interception