What’s the risk of not doing so immediately? I’m not too familiar with PayPal scams, was under the impression you had 180 days buyer protection?
There is no risk in waiting a few days to file a claim.
You will only have an issue if you already made a mistake (paying in 2 payments for 1 item, send it via friends and family)
When I filled mine I was using it as a tool to force action on the sellers part. He responded within hours of the claim; then took offence ( even though the dispute/claim can be cancelled if he just fulfilled his end of the deal)
So all you are down to is losing time.
That’s why I said file immediately.... force the hand of the person you are doing business with, especially if they have been unresponsive! Just my $0.02