google pixel 5g. can i turn off 5g?

So I just bought a pixel 6 from T-Mobile. My old phone has 5G but I have  turned it off and turned on the 4 G. I'm just not into getting my brains fried out by 5G right? I didn't realize the 5G was right there in the name of the phone. So, I'm hoping I can still turn it off or opt to use the older technology. Thank you in advance for your replies.