I have been looking for a phone holder that I didn't have to put in and take out. Something that would not fall off or come loose. I came across one that bolts behind the grab bar on the passengers side. It fits well, very solid. So far it fits the bill.
https://www.amazon.com/gp/product/B08H1XSXQ4/?tag=jkforum-20
https://www.amazon.com/gp/product/B08H1XSXQ4/?tag=jkforum-20