Unique code repository for multiple Wix sites

I wonder if there is a possibility of a single code repository for multiple Wix sites.
If not, any alternative.

Objective: Simplify site maintenance, reduce maintenance costs, reuse code.

#maintenance
code repository
#multiple Wix sites

Could anyone from the WIX team help me? Or some design improvement ahead that can alleviate these pains.

My goal with this is to give developers a large scale to be able to market a single site template and focus on maintaining code in just one place that could be replicated to other copy sites.

This will reduce the costs of site maintenance, code reuse and sharing of the central repository with the other sites defined by the developer.

The developer, the client and Wix in this model wins.

For example: see the attachment.

Someone with any suggestions or criticism that may point to improvements or alternatives.

Wix engineering team, could you help too? And congratulations to all of you for the work you have done, I know it is not easy to build all this.