those times were off the all athletics.com website. It is an international data base for IAAF sanctioned events. I am just checking on few other young guns who also race triathlon that I can find on the site, just for comparison.

Gordon Benson 1994 same year of birth. look at the dates of his races.. was about 17 for most. must then gone full time triathlon
800m1:58.21Stretford (GBR)22.07.2012
1500m3:54.93Stretford (GBR)01.06.2010
3000m8:21.27Stretford (GBR)01.05.2011
5000m14:28.52Stretford (GBR)17.08.2013
5 km Road14:23Armagh (GBR)22.02.2015
10 km Road30:27Leeds (GBR) 17.11.2013

Jacob Birtwhistle, born 1995, most these would been done about age 17, 10k is a bit later so maybe 19
800m1:53.40Hobart (AUS)03.11.2012
1500m3:51.19Sydney (AUS)18.03.2012
3000m8:09.12Melbourne (AUS)08.12.2012
5000m14:19.52Melbourne (AUS)22.11.2012
2000mSC6:13.96Melbourne (AUS)04.12.2010
10 km Road29:23Sydney (AUS) 02.05.2015

Dorian Coninx, born 1994 these were done at same age as Smoragiewicz pb's, 22
10 km Road29:11Cannes (FRA)21.02.2016
20 km Road1:05:38Cassis (FRA) 25.10.2015