In the past couple of months, we have covered a bunch of neat iPhone 11 Pro cases and accessories here. This Shoulder Holster for iPhone 11 Pro Max & older models is also worth a look. It lets you carry your phone and other items by your side. It can 4-way adjustment to fit the wearer perfectly.
This concealable shoulder holster has a lightweight nylon construction. It should work for iPhone 11, iPhone XS Max, iPhone XR, and other comparable models.[where to get it]