I made "traditional" enterprise-style-apps for small business and have tried to crack the sync of data several times. Exist a resource in how leverage that tec

I made "traditional" enterprise-style-apps for small business and have tried to crack the sync of data several times. Exist a resource in how leverage that tech with boring stuff like inventory, invoices, etc? Hopefully,. without a total change of stacks (I use postgresql, sqlite as dbs, and need to integrate with near 12+ different db engines)