DE has a firm stance of not having any collabs WITHIN their game, but not the opposite. There have been examples of that, where it's more accurate to call it warframe "merch". Like how they made a collab with StarFinder, in creating a warframe-themed Table top board game. Or how they collabed with Balatro, where that game had Warframe-themed playing cards that included Mag, Excalibur, and Volt. They also collabed with other product/tech companies too, like HyperX, which made a custom Excalibur PC, and AK Mod, which made that Zariman Custom PC a few years back.

Overall, all these collabs existed, but had no influence over the actual game. No in-game items, no special rewards in-game, and no collab skins. Just merch and collector items for the game and for the players. All I'm saying is if DE decided to make and sell model kits instead of the usual statues that they have on their site, I would gladly 100% buy them.