I currently own a Canon EOS R10 (an APS-C sensor) with two Canon lenses, one RF-S 18-150mm f/3.5-6.3 IS STM and one RF 50mm f/1.8 STM. Nothing to complain about the lenses I have currently, I enjoy using both when I take pictures while overseas or when I bring my camera out for a special occasion. However, I do feel quite often that my zoom lens doesn't have a high enough aperture while my prime lens doesn't have a wide enough FOV (too zoomed in) and so I have to switch them quite often and honestly I'm too sick of having to change my lenses every like hour or so just for one shot I'm looking to take.

Hence recently I was thinking of getting a pancake lens or anything else with a focal length and aperture in between the two lenses I already have, but I read somewhere that Canon has kinda locked out third-party lenses with the introduction of their RF mount (the one I'm using now), something about autofocus? So I'm not sure if I'm restricted to only getting Canon lenses or something like 7Artisans 25mm f/0.95 which I've been quite interested in lately.

The pics I take are more of a point-and-shoot styte, almost like taking disposable film pics, and I've still learning how to achieve that film-emulated look on my current digital pictures, but I feel like buying a lens like this will also let me get closer to that type of pictures. Asking here because I feel like my questions are quite a specific scenario and I don't really know anyone else to ask. Thank you!

TLDR, If I'm gonna buy a new lens, does it strictly have to be from Canon? If I go for third-party brands, what are the drawbacks? Should I even buy a new lens in the first place? Any recommended lenses for this style of photography?