As strange as it sounds, distributors cannot provide biographical information for artists in the music stores. However, for a few stores, you may be able to do it on your own using some store's own artist tools or through 3rd parties as outlined below.
You can update your artist image and bio through Spotify for Artists. Learn about getting instant access via Catapult here.
Apple Music / iTunes / Shazam:
You can modify/upload your artist image directly via Apple Music for Artists. If you are not already registered, sign up for Apple Music for Artists directly through Apple:
When asked for contact info, you can use your own.
For all other stores, you might need to reach out to each of them on your own. Many stores utilize an independent 3rd party company called All Music (Formerly, All Media Guide) that manages and facilitates a music database that provides bio and review information for many outlets (Including Apple Music). You can try reaching out to them to see if they can help.