Tuomaala turned 20 in January, pretty standard for a CHL D+2 prospect.
There just aren't a lot of Finnish and Swedish prospects to start with, and the best soon come over to NA after they're drafted.
Here's the Allsvenskan list (tougher than Mestis, so you'd expect more prospects, some Finns come here to play):
Drafted the last three years.
Pasic - #189-2020
Nybeck - #115-2020
Ohgren - #19-2022
Ostlund - #16-2022
Magnusson - #211-2020
Persson - #85-2022
Sjoberg - #207-2021
Johansson - #74-2021
Nilsson - #134-2021
Jacobsson - #177 - 2021
Niederbach - #51-2020
Jansson D - #125-2022
Tarnstrom - #92-2020
Myrenberg D - #220-2021
Forsell - #201-2021
Lyckasen - #173-2020
Lekkerimaki - #15-2022
Ljungman - #154-2020
Odelius D - #65-2022
Nickl - #104-2020
Ekefjard - #192-2020
Lindewall - #200-2020
Notice there are (10) 2020 draftees, if Toumaala can't graduate to Liiga next year, I'd consider him a nonprospect like most of these players.
2022: (3) 1st rd, (2) top 100, (1) later in the draft
2021: (1) top 100, (5) later in the draft