Nope, the G3 flex, which is the 'default' camera can be mounted outside no problems at all. they are about 60-70 each and work great. I have about 15 of them inside and outside. over 2 sites.
I'd recommened the unifi protect system for an easy to use easy to install affordable good performing system if you are looking to install no more than about 10-15 cameras at most on one controller. You can upgrade to beefier system but it's more $$$
Theres none of the weird chinese style stuff that I've seen in these knockoff systems, the unifi stuff is really nice all controlled via phone app as well if you wish.