Mask maker seems to be a job title, as there are now 2 different entities with that name. They are not higher beings, as the one in Silksong refers to Hornet as such and also makes it clear they are different from the mask maker themselves. But it seems long lived, as they know about the weavers and the one in Hallownest also remembers the kingdom before its fall.
The mask seems to force their behaviour, as the bug is behaving very different after knocking the mask off. As they say themselves:

to exist, a face is needed.

While on the one hand that references the way the health of the player is shown in masks and increased by mask shards, it gives also interesting implications.

Does that mean the step to being a bug with consciousness requires a face/mask for those without it? And if so, does the mask partially control the personality? That would fit to what happened to Brumm at the end of the Grimm Troupe DLC. The mask maker says their work is of necessity, so it seems connected. Especially how in act 3 they talk about how to die, a face is needed.

Maybe that was how the pale king also brought his kingdom into being? By bringing the mask maker with him, where before the faceless bugs didn’t have higher cognition and were easily enthralled by the Radiance? Because the mask maker in Silksong refers to a contract that still remains and binds them to their work. This of course necessitates some other party that the contract is made with. Some entity of higher power.

Contrary evidence are e.g. the stilkin and burning bugs, who lack a visible mask but still are of high enough intellect to create a civilisation and have language capability. The cutscene after defeating the first sinner, where the weavers masks where shown to be created from a different source is kind of in the middle. It shows that masks can be changed but also shows how the result of that change is definitely a much different entity from before.

So I’m a bit stumped here. The dialogue of the mask maker implies some higher power, but I don’t really see clear connections to other lore.

What is your interpretation of this enigmatic individuals?