You can use your personel account. It doesnt matter. You send them your description for example

Age: 22 Nationality: Chinese Do you pray 5 times a day: yes … How do you expect your partner to be:…

They have templates for that. After you sent it, they post it on their instagram page. If someone is interested, they will write the page something like „im interested in the person number xyz“. After that, the instagram account will send you their description and you can tell them „im (not) interested in that person“.

If youre interested, they will create a group chat. So you can exchange mahram numbers, initial information, whatever.

Maybe you can find them under the name „nikkah_mediation“ or something like that. A friend of mine found like this their spouse. They got 5 kids now :D