I am forced to maintain graphql AND rest


I have recently switched from rest to graphql. Now I have already had two clients (companies) that refuse to consume graphql and demand REST.
I am basically forced to maintain both APIs. What is a low maintenance way to keep both systems running and synced? Should I just focus on REST again and then wrap the endpoints in a graphql schema?

It seems that graphql is great when used within a corporation when you have full control over the consumers. However, when using it for a public API one basically needs to have REST as well at the moment.