can't load powerlmm

[lisakaly]

I have an R version 4.2.2 on a MACOS. I try to download the package ("powerlmm") bu the answer is "Warning in install.packages :
package ‘powerlmm’ is not available for this version of R

A version of this package for your version of R might be available elsewhere,
see the ideas at
https://cran.r-project.org/doc/manuals/r-patched/R-admin.html#Installing-packages"
I tried with the code :devtools::install_github("rpsychologist/powerlmm") but this also was uneffective.
Can you help me (step by step) ? thank you very much