Their spawn commands are:

gmsummon "shoulderdragon_character_bp_summer_c" 150

gmsummon "shoulderdragon_character_bp_autumn_c" 150

gmsummon "shoulderdragon_character_bp_winter_c" 150

gmsummon "shoulderdragon_character_bp_spring_c" 150

The 150 can be any number, this indicates the lvl before taming. The only difference between each command is literally just the name of the season. You're welcome. Idk why the youtubers don't put this stuff up first thing.

Spring Drakelings - Highlands

Summer- Canyons

Winter- snow highlands

Autumn- edges of snow

I have had these spawn on Scorched Earth by the blue water section of the river. Not sure if it's a bug as of yet or it's a feature but I have had a summer drakeling spawn on Scorched.

We’re on an unofficial server. We have no mods in regards to dinos. We are currently on extinction. Dododex and google says they are not on said map. I have tamed several winters, a couple summers, and a spring on said map. 🤷🏻‍♀️

They spawn in the highlands

on rag

Drakelings are biome specific, and will receive a power boost aslong as they're in their home home, I just got a winter variant from killer snow on rag