Need Sharepoint/power app export: Create Purchase order system and articles database -- 2

attach is the full description of the project. Short desc: We will use powerapps to search articles and to add articles from main articles-list to the project articles list. First we will add articles from main article list to articles in specific project. Should be Possible to add new “articles” on the fly, and update price manually while adding articles to project. After we have selected articles, there will be a button to create PO for selected items. When a PO Is created – Send PDF to supplier & project manager. When PO is created, the Ordered column should be checked (checkbox) and Ordered date should be filled with todays date.