If you do that then the palyer would never slow down and all platforms would be very slippery!
idk what program you use, but in Unity you just add a physics 2D material to the collider and it works just fine. If it's too slippery, you can probably just make multiple colliders (one for ground and one for sides) or adjust your speed variable. It always works for me, but maybe that's just a Unity trick?
I used Gdevelop. It's pretty limited as an engine and I don't think you can add multiple colliders. I also don't think that would work because when the direction of gravity changes a different side would be in contact with the platforms. I tried increasing linear dampening but it affected jumping. I also tried to change the speed when in collision with a platform but it bugged out. I'll keep working on it after the jam and see if I can find a solution. Thanks for the advice!