Fair, I don’t know if they make any 365 with the non flat trigger and optic mount, I see the 365X has the optic cut (which I value, since I run optics on my CCW).
Sig will build the P365 series in any combination that you want. But it can often be cheaper to buy a P365 series pistol and then modify it. For example, I prefer the curved trigger because it allows more room for a gloved finger. I don't want optics for concealed carry. So it was cheaper for me to buy a P365 and install an XL grip module.
When I eventually buy a P365XL with iron sights, I will remove the flat trigger and install a curved trigger and it will be much cheaper than buying a P365XL built by Sig with a curved trigger.
What I do like about this platform is it's versatility and ease of customization. You start with 4 basic form factors.
1. P365 with short slide and short grip module.
2. P365 with short slide with taller XL grip module.
3. P365XL with longer slide on a shorter P365 grip module.
4. P365XL with longer slide with taller XL grip module.
You can swap grip modules in less than 30 seconds.
There are several aftermarket grip modules available in both plastic and aluminum.
You can get the P365 series with or without a manual trigger safety.
You can use either a flat or curved trigger as you prefer.
Aftermarket trigger kits are available for those that prefer a different trigger pull.
You can add optics to any of these form factors.
Several aftermarket extended magazine release buttons are available and are useful for people with longer thumbs.
There are multiple magazine capacity choices.
MagGuts offers spring kits to add 2 additional rounds.
There is also the P365-SAS for snag free conceal carry.
There is also the P365XL SPECTRE COMP with internal compensation.
Aftermarket compensators for barrels are available.
There are a lot of options to "Have it your way".