Are you just searching for reward availability for the long haul segment or for the entire trip from GLA?

If you’re searching for reward flights that include a domestic connection I find clicking that you do want a stopover opens up far more options for the domestic leg.

For some reason if BAs system doesn’t see reward availability for what it deems an appropriate domestic connecting flight (no idea what the parameter/rules are for this), BA.com shows no availability for your entire trip.

Clicking that you do want a stop over but then just entering the same day as the date you’re continuing your journey seems to show all availability for your domestic route that day, not just the ones the system seems to deem appropriate for your LH leg.

Apologies if its the LH let that there’s zero availability for as obviously this won’t help.