10^27 future lives

Ok here’s my Rat fermi-time traveller party paradox, in short, the Rat FTTP paradox.

1. According to Rat doctrine, many worlds is true and science is amazing and will solve all problems eventually.
2. Lack of time travel is a problem, meaning in some world, eventually there will be time travel, by 1.
3. Lack of 10^27 people is a problem*, so we will also have that, also by 1.

The paradox: If time travel is so easy and there will be so many future lives, where are all the future rats?

No seriously, where are they? This FTTP orgy was supposed to start 24 hours ago.