If demand doesn't fall down or current manufacturers supply go up, somebody (presumably in China) will spin up fabs. Apple wanted to use blacklisted Chinese RAM already.
spinning up fabs takes ages, micron has a US fab started bulding in 2023, its still not operational (projected to start mid-2027)
I am hopeful but I am not confident China has the capability to do it.
It's the euv machines that are the bottleneck. Pretty hard to ramp those up any faster in the next few years.