HSA in year of medicare enrollment for TP (MFJ)

[Treasur2]

My understanding is that post 55, both TP and SP under a "family plan", are entitled to $1,000 catch-up contribution. If one sp fully ($ 7,000 + $1,000 (catchup) = $ 8,000). funds HSA.
Second SP can fund $1,000 catch-up, as long as its in a separate HSA.

Therefore the real-world client calculation below.

TP...