https://pmc.ncbi.nlm.nih.gov/articles/PMC5547349/
https://ourworldindata.org/lonely-not-alone
But frankly I wasn't kidding when I said every quality survey shows this.
If you have ever seen an article suggesting that loneliness is higher in the West or in capitalist economies or whatever, you have been 100% misled. That is essentially just a made up narrative that plays well in articles