If you are planning on OWB open carry, I’d get a level II holster minimum, and since you like leather — I got one of these for my Sig P365 XMacro and its been a great holster > https://www.falcoholsters.com/lvl-2-retention-pancake-leather-owb-holster-with-security-lock-c142?variant=2319

but even if you don’t want a level II, for OWB open carry you can still get an active retention instead of that kydex passive retention (passive is the worst retention in the world against possible gun grabs), you can get one of these:

https://www.falcoholsters.com/open-barrel-quick-draw-owb-leather-holster-with-security-lock-c133-cheetah?variant=965
https://www.falcoholsters.com/quick-draw-owb-leather-holster-with-security-lock-c134-cheetah?variant=969
https://www.falcoholsters.com/pancake-style-owb-leather-holster-with-security-lock-c135-cheetah?variant=973

All of the above falco holsters I posted above will also conceal with OWB as well, but also remember for IWB or OWB conceal with any holster your cover garment matters if you want to reduce printing.