Yes, there are two types of bolt-on fenders for the 2025+ Psylo Silver RC/R A1. The fenders are lower leg dependent and are not cross-compatible. See the graphic below.
If your fork's arch does NOT feature a bump, then you’ll use part number 00.4318.053.000 (RockShox MTB Fender - All Mountain A1 Black Short 3 Bolt - Lyrik(D1-D2/2023-2026),Pike (C1+/2023+), Psylo(Short Fender Lower Leg only) A1+ (2025+)).
If your fork’s arch DOES feature a bump, then you’ll use part number 00.4318.103.000 (RockShox MTB Fender Black Short Trail 3 Bolt - Reba (B1/2026+) Psylo (Full Fender/ABS Lower Leg only) (A1+/2025+)).
Fender mounting bolts are M3-.5x11mm (x3) for “All Mountain” fender and M3-.5x11.5mm (qty 2) and M6x9mm (qty 1) for “Trail” fender.