Fetch Forms' Data (Submission Table) From Wix to a Custom CRM

Question

I have developed a CRM Application in which I am fetching Leads from Facebook Ads via Graph API through Bulk Read.

I want to do the same with WIX but I am unable to find suitable Docs for it, I have previously not worked on WIX. I went through WIX Webhooks but I am not sure if this will fetch all the Data or just the recently submitted form. Moreover, I am not getting how to implement this too.

I tried retrieving messages but for this, I had to send one request per lead and also figure out all the conversation Ids.

Kindly Refer me to the suitable Docs or Tutorials.