Yeah seems a bit of an odd one to me, and yes I think also is last year of his Scun-thorpe contract.
You have missed the start of the season with injury, your team is struggling in last spot, you are possibly playing for your club career, you are finally ready to play, and you choose to bypass 1-2 League Two matches, to fly 20 hours for a pair of effectively meaningless U23s friendlies.
Buckingham will pick his 2020 Olympic squad (should the U23s qualify) not based on these two Olyroos games, but based on each individual's club form over the next 12 months.
It's almost like Lewis is trying to put himself in the shop window of some A League clubs. Who doesn't love some speculation. Just seems an odd choice.