Is this where you have checked?
https://www.ebay.co.uk/mes/transaction-reports?q=tax
If 'digital sales report' is greyed out, then Ebay have not passed any figures to HMRC yet.
"There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.”
Søren Kierkegaard, Danish philosopher (1813 - 1855)