You didn't wait long enough to list - wait at least 30 days and list low cost non risky category.
Also have to buy the Residential Proxy from IP Burger, it's more expensive - but the others are garbage. OR use VPS.
Patience is the key, otherwise it will fail. If you need to sell fast, then find friends/family with legit accounts.
eBay's philosophy is new account users don't sell, mainly only buy. New user start selling, it's a red flag in their eyes.
Yes ebay sucks most the time, but it's their website and they make the rules, we have to follow to play.