You are best suited going through Salesforce won support and asking them how to integrate their own forms into Wix as it is a third party code provider and Wix will not provide support for third part codes that it has not fully tested itself.
https://support.wix.com/en/article/using-iframes-to-display-visible-content-on-your-site
You would most likely have to get the form in html code and place it in your page in a html iframe, as like shown here.
https://www.picklewix.com/single-post/Salesforce-Forms-on-Wix
if you are wanting to pass data from a page to a html component or from the html component to a page, then you can look at using html component and the getMessage and postMessage functions.
https://support.wix.com/en/article/corvid-working-with-the-html-element
https://www.wix.com/corvid/reference/$w.HtmlComponent.html
However, as they have their own API, you are much better and more secure using the companies own API and using either Wix Fetch or Wix HTTP Functions.
https://help.salesforce.com/articleView?id=pardot_sf_connector_understanding.htm&type=5
See here for an example.
https://www.wix.com/corvid/forum/wix-tips-and-updates/example-myapi-and-myapiclient
https://www.wix.com/corvid/reference/wix-fetch.html
https://support.wix.com/en/article/corvid-accessing-third-party-services-with-the-fetch-api
https://www.wix.com/corvid/reference/wix-http-functions.html
https://support.wix.com/en/article/corvid-exposing-a-site-api-with-http-functions
Or just be lazy and do it all through Zapier as shown here.
https://www.wix.com/corvid/forum/community-feature-request/zapier-triggers-and-action-for-wix-code/p-1/dl-5c3493560380c9001cea2773