Are there power switches in the sky130 library?

No, but @User made some waffle-geometry power transistors that were put on the first ChipIgnite run.

How about these ? sky130_fd_sc_lp__sleep_pargate_plv

@User where do you see that cell? I tried https://github.com/search?q=org%3Agoogle+sky130_fd_sc_lp__sleep_pargate_plv

It's probably not searching inside the cell repo, you can try find in a local copy . Found it here: https://github.com/google/skywater-pdk-libs-sky130_fd_sc_lp cells/sleep_pargate_plv/definition.json

Thanks. sky130_fd_sc_lp is totally missing in https://antmicro-skywater-pdk-docs.readthedocs.io/

Are you looking for power switching for an entire circuit or a standard cell? The sky130_fd_sc_lp cells are standard cells that switch between normal and standby power for some portion of a digital standard cell layout. Which might be what you're looking for?

I'm looking to power off a domain of stdcells

Then the LP library cells might be correct to use. The documentation problem was handed down from SkyWater. There is no documentation for the standard cell libraries. This is particularly problematic for those power domain handling cells, since it's not at all clear when they are supposed to be used, and how.