Soliciting sex services thrrough IG is against their TOS and can get you and the other person banned. Though they might have a linktree link in their IG bio that has their email contact info.
realescort and seksitreffit are the best places for Finnish escorts. Haven't seen inkkubabe or Marianne Kallio there though.
But plenty of others escort. TuhmaMyy, spicybarbii (with the name alisa), Ihanaisa, ilonatql, tuhmasivu/petitepearl, millxxo, bunnysamara, to name a few. Just gotta follow the websites and try to catch them in your city or see if you can visit the city they're in.