Although KashFlow does not have a dynamic link with eBay managed payments, this can still be done with a ConnectMyApps subscription which is available straight away, however, this is being discontinued after January 2021.
We are also looking at alternative third-party applications such as Zapier that can also link with eBay Managed Payments. We are currently aiming for this to be available towards the end of 2020 or early 2021.