Add exclude parameter to keysend

I want to let users pick the first hop for their payment. In the pay command I can achieve this by excluding all channels but the selected. (In xpay it can also be achieved with channel bias)

Unfortunately with keysend payments I cannot achieve this, as the keysend rpc does not expose an "exclude" parameter.
Can you please add an exclude parameter to keysend the same way as on the pay command?
Or is it possible to do keysends using xpay?

Here are the links to the rpcs:
https://docs.corelightning.org/reference/keysend
vs
https://docs.corelightning.org/reference/pay