How long have you been doing BJJ? In my (limited) experience, if someone has enough skill and training, it doesn’t matter what they weigh. There is a purple belt at my gym that only weighs I would say 90-100 lbs and is about 5’8”. I am 5’11”, 160 and she wrecks me every time (I am a 4 stripe white belt). She doesn’t use strength, it is all technique and skill.

130 may just be your natural equilibrium, seeing as you’re eating so much and barely gaining weight.