quoted

IIRC the idea was to use 'send_probe_response' for now and then to
implement the use of NL80211_RXMGMT_FLAG_ANSWERED flag in hostapd, at
least for probe requests for the start. But it definitely doesn't
make sense if you plan to get rid of this flag in the long run.

No no! I'm not saying let's get rid of it if you need it - I was saying
we could get rid of it since it doesn't appear to be used. I think this
is fine for your case, in fact you should probably already set it and
then go and teach hostapd about it.

Good. Then I will move forward and attempt to teach hostapd about it.

Regards,
Sergey