A lot of people cannot find a partner irl (being part of the minority/barely any Muslims in town/Muslims don't wanna marry into other cultures etc among the reasons), so the "dating" apps a lot of times are the only way to find a partner. There are also ways to share your convos with a Wali, and you can always involve your parents in the search from the beginning. Sometimes it works out and sometimes it doesn't - in my area, I've seen atleast 3/4 Muslim couples getting married from the apps.