My HP Smart Tank 5100 printer needs a 2.4 GHz network but the Gateway is 5.0. Is there a way to change it?

My new printer has become unusable. HP says to contact my internet service provider. Here is the HP video that says 2.4GHz is required  https://youtu.be/O-hSNDCJTTM?si=y0hOIRhxD2mTQuJG

Xfinity, please advise. I tried to use the Xfinity chat bot but it didn't understand my question. My HP Smart Tank 5100 printer needs a 2.4 GHz network but the Gateway is 5.0. Is there a way to change it? 

Thank you in advance!