I've done a fair amount in the Crown Tundra, the Calyrex and Regi quests are finished and I've caught Galarian Moltres and two of the Musketeer trio, I still need to catch Cobalion and Galarian Articuno and Zapdos. I (perhaps stupidly) used one of my two Master Balls on Ice Rider Calyrex, so it's a toss-up between Articuno and Cobalion for who gets the second Master Ball (Zapdos should be fine), I'm thinking Articuno because the hail in the area it's in will cause problems during the battle.
For Dynamax Adventures, I've caught the original Articuno, Suicune, Lugia, Uxie, Giratina, Cresselia, Thundurus, Kyurem, Yveltal, Tapu Lele and Tapu Fini, and I have paths saved for Entei, Zygarde and Tapu Koko. I may take a break from Dynamax Adventures for a while though, because I am a bit burned out on them.