I’d argue they’re the most vocal about it, but no. They release a half lobotomized set of tools, they keep making modder unfriendly changes to the games (recompiling the exe for no reason every time a new cc mod was released for Skyrim, which meant you needed to wait for skse to update too) including having load order broken at launch in Starfield. Also the many ways and attempts they’ve made at monetising mods with them getting a cut. Not to mention this new Oblivion game needs new tools to work with it and once again like with Skyrim VR, “modding is unsupported”, though that could just be a decision made by the Devs since they’re developed by third party studios.

I’d say Larian is actually pulling their weight tho, with bg3 modding going quite well and them frequently highlighting mods on their twitter. Also CDPR who looked at the most popular mods and added them to the base game as polished features.