What we actually wanted to do is to attach all our products to our only entitlement. Found workaround:

1. GET already attached product_ids to our entitlement via api.revenuecat.com/internal/v1/developers/me/projects/PRODECT_ID/entitlements
2. GET all existing product_ids via api.revenuecat.com/v1/developers/me/chart_options_v2/revenue from product filter options (it is not limited to 1000 result entries)
3. POST product_ids to api.revenuecat.com/internal/v1/developers/me/projects/PROJECT_ID/entitlements/ENTITLEMENT_ID/attach_products in order to attach products to our entitlement

Not sure if it is OK to use your internal API directly to do this, but your UI at the moment is limiting us to do it manually .

One more interesting finding. This API call also returns 1000 products max per each entitlement:

GET api.revenuecat.com/internal/v1/developers/me/projects/PRODECT_ID/entitlements

Hello Timur, 

Apologies about the delayed response. 
Good to see you pushing our boundaries. We have taken your feedback to our designer’s desk and in the meantime happy for you to use our internal API. 

In case you run into anything else please email support@revenuecat.com for quicker help. 

Best, 

Anna

Hello Timur, 

It seems like the limitation you highlighted will be lifted as part of a bigger initiative that we are working on in Q3-Q4. 

Thank you for the feedback again and have a great day,

Anna

Thank you, Anna!

Hello, any news? We're dealing with the same problem. We also have more than 1000 products in our app.

Thanks.