Hi there,
Looks like some of your content is from a page builder so those should be fine when you migrate.
Some of the content is from the previous theme so those would need to be rebuild.
We cannot offer that service and don’t really have a list of recommended developers.
You can try contacting one of the developers who contributed to our site library templates:
https://generatepress.com/site-library/
Or join our GeneratePress Community Facebook group and post your request there.