Yes, you can let third parties use model data you create on VRoid Mobile.
VRoid Hub allows you to manage, share, and distribute your 3D character models.
When you register an avatar you created on VRoid Hub, you can set terms and conditions for use of that avatar.
For more information on terms and conditions, see the article below.
▼About the characters conditions of use
https://vroid.pixiv.help/hc/en-us/articles/360013153714
About terms of use for model data created using content (hairstyles, outfits, etc.) for which pixiv holds the rights
Creators can set the following terms of use from "YES" to "NO" at their discretion.
Avatar use: YES
Violence: YES
Sexual acts: YES
Commercial use by corporates: YES
Commercial use by individuals: YES
┗For-profit activities (donations, etc.) by individuals: YES
Alterations: NO
Redistribution: NO
Attribution: Unnecessary
About terms of use for model data created using content (hairstyles, outfits, etc.) for which pixiv does not hold the rights
Creators can set the following terms of use from "YES" to "NO" at their discretion.
Avatar use: YES
Violence: NO
Sexual acts: NO
Commercial use by corporates: NO
Commercial use by individuals: YES
┗For-profit activities (donations, etc.) by individuals: YES
Alterations: NO
Redistribution: NO
Attribution: Unnecessary
A list of items with content for which pixiv does not hold the rights is shown in the Help section linked below.
▼About the conditions of use for content not owned by pixiv
https://vroid.pixiv.help/hc/en-us/articles/900004505826
If you're using data that another creator holds the rights to, such as textures you've purchased, you will need to abide by that data's license and terms of use.