Something like this with $page set to 1 to start. Modify as needed
https://www.quadrotech-it.com/blog/office-365-mail-traffic-statistics-by-user/
do
{
$CurrMessages = Get-MessageTrace -Status pending -PageSize 5000 -Page $Page | Select Received,SenderAddress,RecipientAddress,Size
$Page++
$Messages += $CurrMessages
}
until ($CurrMessages -eq $null)