Really? Looking online, it seems to be taking ~30GB, which isn’t much relatively speaking (considering modern AAA games these days can be 100+GB).
Phones nowadays come with 128GB as base option, and typically even offer a 256GB model (eg the Pixel 8). So Warframe shouldn’t really be an issue for mobile gamers who typically buy beefier phones than the average.
I thought it was like 60-80GB last I played, which was a couple of years ago.
The replies here from a few months ago suggest 26-36 GB.