Sure, but my comments still stand.
And BA won’t even through-check to another BA flight unless it’s on the same ticket.
Airlines seem to be putting more requirements on both the passenger and the airport.
Through-checking seems to be getting more restrictive across most airlines.
LCCs aside (where it's mainly point to point with no through-checking). A lot of legacy/hybrid/full airlines aren't interlining on their own flights (e.g DL to DL, VA to VA, etc) unless if it's on the same ticket.