padding when unbound does not speak TLS?

[Christoph]

Hello,

we run DoH and DoT resolvers where dnsdist
terminates the TLS connection and forwards queries via
plain UDP/53 to multiple unbound instances.

stub --(DoH or DoT)-> dnsdist -(Do53)-> unbound

dnsdist does not support padding [1].	


Unbounds documentation:
>        pad-responses: <yes or no>
>               If  enabled, TLS serviced queries that contained an EDNS Padding
>               option will cause responses padded to the  closest  multiple  of
>               the size specified in pad-responses-block-size.  Default is yes.

suggests that it only supports padding on TLS connections.

Is it possible to enable padding in unbound also in cases where unbound 
does not speak TLS itself?

thanks,
Christoph



[1] https://github.com/PowerDNS/pdns/issues/10018
[2] https://nlnetlabs.nl/documentation/unbound/unbound.conf/