These days? Pretty much never. They have barely approved any over the past four years, and stated two years ago that they were more or less not doing it anymore. Maybe they'll start doing it again one day, but I don't believe there have been any indications of doing so.
https://psteamcommunity.yuanyoumao.com/app/552500/discussions/0/3196993949760786435/#c3182359786949624420

God i wish they still did approve them, lazy sods.. I'd love to be able to see an outline around players calling for help or group up. There are many great mods that deserve to be in normal realm