The part after "?tag=" is an affiliate identifier that Amazon will automatically add. You can safely remove everything after and including the "/ref=" part and your link will still work.
In fact you don't even need the descriptive part of the link.
https://www.amazon.com/dp/B09QCP58DG will work just fine

NOTE: The above comment contains link(s) which have an affiliate marketing identifier:

amazon.com/PHOME-Headboard-Adjustable-Compatible-Headboards/dp/B09QCP58DG/ref=asc_df_B09QCP58DG/?tag=

That means that someone gets paid if you follow that link and make a purchase.

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