Flow to replace SharePoint site page text web part content from form entry

Hi GavinK9 , you can try also SP Pages API in Ms Graph https://devblogs.microsoft.com/microsoft365dev/microsoft-graph-api-for-sharepoint-pages-is-now-generally-available/

This method is similar to the one using CanvasContent1, but it is implemented slightly differently.

First, use the CheckoutPage action by sending an HTTP request to SharePoint:

And then HTTP request to SharePoint: to save a CanvasContent1 property of a page:

The best way to obtain a correct CanvasContent1 value is to retrieve the content from an existing page and then modify only the placeholder in the Text Web Part.