Is it possible to create a SharePoint page out of Sharepoint page template using PNPJS

[maxkuzma-munich]

What type of issue is this?

Question

What SharePoint development model, framework, SDK or API is this about?

💥 SharePoint Framework

Target SharePoint environment

SharePoint Online

What browser(s) / client(s) have you tested

• 💥 Internet Explorer
• 💥 Microsoft Edge
• 💥 Google Chrome
• 💥 FireFox
• 💥 Safari
• mobile (iOS/iPadOS)
• mobile (Android)
• not applicable
• other (enter in the "Additional environment details" area below)

Additional environment details

No response

Issue description

So basically I'm currently trying to create a new sharepoint page from a template page that I have created earlier, all that using PNPJS. The issue is that I cannot find any way to directly create it from the template like I would do in SharePoint when clicking on the New->Page->Saved on this site->and select the template i need. As far as I read the PNPJS documentation, there are 2 ways of making a new page based on the template page:

1. loading the template page using loadClientSidePage and using copy function to replicate the template page

const templatePage = await sp.web.loadClientsidePage(templatePageURL)
await templatePage.copy(sp.web, newPageName, newPageTitle, true)

the downside of doing it, is that the newly created page is also marked as a template page which I do not need. I tried removing that tag using this approach

// Load the newly created page, and set SitePageFlags to null to remove its 'Template' flag
await sp.web.lists.getByTitle("Site Pages").items.getById(pageId).update({
    OData__SPSitePageFlags: null // Removes the template flag
});

while doing that, sharepoint gives an error that the field is not nullable so I have also tried to set it to [], "", ''. Nothing helped

2. creating a new page using addClientsidePage, loading the template page, and using copyTo function to copy the contents from template
   this approach is a bit different because it does not copy the entire page but only it's contents, the problem with that is that the newly created page does not replicate the layout of a template page etc. which is essential when creating a page from a template (new page has to be the exact copy of a template page but without being a template itself).

so my question is, is there a way to make an exact copy/create a page using a template page so it is the exact same page as a template without it being flagged as a template too? Maybe there is a way of changing the type of a new created page to normal page insted of it being a template?