Increement canvas app changes deployment

Hi,

I have one canvas app and have 14 CDS entities that have deployed to on Testing environment from Development environment through Unmanaged solution export - import feature and it is working properly.
Now I have done some changes in Canvas app and want to deploy only canvas app changes on Testing environment.

Can you please suggest me how we can deploy only Canvas app change? because on Testing environment data is already exist that I do not want to delete.

Please also suggest if in future I need to deploy only CDS change then how we can do?

Regards,

Lalit Kadam