Maybe I'm wrong, but I thought in this scenario obscura has your IP, but not the web traffic/public IP. Mullvad knows web traffic/public IP, but not yours. Neither knows both so neither can individual...
But Obscura can in principle relay my IP to Mullvad and then Mullvad has the full picture. So it is like a condom on Mullvad’s offering? 😁 Is that the idea?