my iphone13, wifi keeps cutting of and coming back on automatically

my iphone13 wifi keeps cutting off and on automatically, I checked my provider, they came physically to see if my internet was working properly, everything checked out , with no issue, I even spoke to a technical person, they seem to think is the iPhone,before this iphone13, I was using Samsung, which was working perfectly find on wifi, no cutting off at all, first time am encountering such, I googled it online they suggested a few things I tried it, nothing works its still cutting off, strange I have the MACBOOK AIR M1, on the same network, the wifi works perfect on the MACBOOK AIR M1, so I find it very strange with this new iPhone 13, and the wifi is just cutting off and on automatically sometimes 2 0r 3 mins, or sometimes more at a time,, its annoyingly even went as far as to get a new phone from apple, as I had the old phone brought back into apple, and they gave me a new one, I tried everything and its not working, can someone help me, it really annoys me when am doing something on my phone and it cuts off, I have to wait until it comes back on, or I would take of the net physically on the phone and put it back on, so I won't have to wait a few seconds until it comes back on.i need some help here its a lot of money for the phone, I even use data, and the phone still cut off