16PCS Silicone Thumb Grips & FPS Aim Rings for PS5, PS4, Switch Pro Controllers - 8 Joystick Caps, 6 Multi-Level Resistance Rings, 2 Protector Rings for Enhanced Grip and Precision Control

I hated the dinky sticks on my Portal as well and replaced them with AYN's aftermarket sticks. It was better but I ended up also getting a set of Switch 2 caps and FPS rings, and I found the shorter convex caps to work nicely. The rings aren't great for consistency since they easily shift around, but I prefer any extra weight compared to the soft default sick tension.