Most believe it will exceed or match series s which isn't happening.
We don't know yet, Switch is around 1/3 to 1/2.5 Xbox One in GPU raw power alone which released 4 years after that one and we have some other factors in play:
1. Nvidia being ahead of everyone else on mobile GPU
2. It releasing at least 4 years later
3. If it's gonna be 3-4 TF it's already around 1/3 to 1/2.5 times of PS5 GPU
Not saying it's definitely gonna happen but it's not crazy to think so imo. PS5 has the smallest GPU leap compared to past generation console, it's roughly 5.5 times the raw power of PS4 GPU (10TF vs 1.8TF), normally next gen tend to have from 8x to 10x the GPU raw power of their predecessors, that means that Switch 2 by mere logic must have at least 5x and at most 10x the GPU power of current Switch y docked mode, that is 2TF to 4TF in FP32 calculations.
Also, it's virtually impossible for Switch 2 to have a worse CPU than the one in PS4 and Xbox One, so at least that one is gonna be way closer to current gen consoles than to last gen consoles.
The only detail I could miss is the storage and RAM, it's gonna have at least 8 GB that's for sure, more than that IDK, but even if at lower bandwidth, it gonna have at least lower latency than current gen consoles (like 96ns for LPDDR6 vs 226ns of GDDR6, less is better). Regarding Storage, yeah, we're yet to see anything about it.
And that's without considering the Nvidia leak that may support this guess I'm throwing... But yeah, I'm not saying it's gonna be PS5 level of power, but XSS isn't even impossible.