Like mentioned in the description, the Glowing Mirelurk Hatchlings spawn by default wherever you can encounter normal Mirelurk Hatchlings.

If you want to spawn Glowing Mirelurk Hatchlings via console commands though, do this

Type help "Glowing Mirelurk Hatchling" 4 NPC_ into the console to get the ID of the Glowing Mirelurk Hatchling.

Typeplayer.placeatme ID 1
into the console, but replace ID with the actual ID of the Hatchling.
You can use any positive number instead of 1 to spawn as many as you want (you shouldn't spawn to many though)

Don't overdo it, console spawned NPCs are not necessarily cleaned up by the game, and might get baked into your save file.
But you can always make a save before doing this and simply reload.