[1] During the 2021–22 season, she spent a month with the Hockey Training Institute (HTI) Stars women's under-20 team, based in Mulmur, Ontario, Canada.

[2] At the 2020 Winter Youth Olympics, Metzler won a bronze medal in the girls' 3x3 mixed tournament with Team Blue Crystals, an international team of thirteen under-16 players that included Sidre Özer, who became the first Turkish ice hockey player to ever win an Olympic medal at the event.

[3][4] With the Hungarian national under-18 team, she participated in the Division I Group A tournaments of the IIHF U18 Women's World Championship in 2020 and 2022.

[5] Aged fourteen years and two months, she was the youngest Hungarian player at the 2020 tournament and tied Petra Szamosfalvi for third in team scoring with 1 goal and 1 assist.

[9] She served as captain of the Hungarian team in the girls' ice hockey tournament at the 2022 European Youth Olympic Winter Festival in Kainuu, Finland during March 2022.