Adding a smart switch to a box originally containing two single-pole switches
Legal colors in conduit wiring:
ALWAYS-HOT: black, brown, red, orange, yellow, pink, blue, or purple
SWITCHED-HOT: black, brown, red, orange, yellow, pink, blue, or purple
There's a convention of black for always and red for switched, but that's purely optional.
Now, these 2 switches have independent control, right? Neither switch is dependent on the other to be on, right?   So... that tells us that whichever wires go to BOTH switches must therefore be always-hot.  Therefore, red is always-hot.
Black is on the other switch terminal, so it must be switched-hot.
On the other switch, I see 2 yellow wires on the same terminal.  One uses the screw and the other uses the backstab.  Sloppy using the backstab but somebody really, really wanted to use the 50 cent switches instead of the $3.00 ones.  Anyway, those must be switched-hot, even though there are two of them.
Neutral, you've met. Make sure those neutrals are part of the same cable or conduit as the hots you are intending to switch, as that's a Code requirement. But they are, here.
I have no idea why there are 2 wires going to the switched-hot. Normally that indicates more than one lamp.  However that's how it was done, so that's how it should continue.  They'll be pigtailed to the new switch unless it has provision for 2 wires (most better switches do).
As for grounds... this hole is already tapped for a machine screw (bolt) of size  #10-32.  Readily available in North America, they even sell green ones just for ground screws - but any will do.