Googling “are men lonelier than women”, first link is Reddit.

Second link is that one:

https://pubmed.ncbi.nlm.nih.gov/37563853/

> Our analyses show that women were more lonely than men also in adjusted analyses.

I don’t have the background to judge that study and I take social science studies with a huge grain of salt. For now, I will just stick to “I don’t know” then.