Only 5 AHL goalies born in 2002 had a .900 SV% in 25-26. As you can see from the chart, the goalies that end up as 1A/1B NHL netminders tend to be showing strong signs by age 23, if not already in the NHL.
Postava .937
Cossa .915
Blomqvist .913
Merilainen .909
Commesso .901
How Cossa's AHL stats at age 23 compared with current NHL goalies.