Do these methods work to view private IG profiles ?

https://inscaptions.com/how-to-see-private-accounts-on-instagram-using-inspect/

https://techcult.com/how-to-access-private-instagram-inspect-element/

I don’t know anything about programming, and sadly I can’t differentiate between rubbish webpages and the real deal when it comes to stuff like that..

I also read about a couple of ios shortcuts that claim to be able to download private Instagram posts if you have the link to it.. is it true?