I could have sworn there have been times we had no Scots players starting, but I could be misremembering.
Our first team squad is about one third Scottish, which isn't unusual these days. Plus we have three more Scottish youngsters out on loan.
The Covid situation has made it much more challenging to bring through youngsters from the academy as they just aren't getting any competitive games to push them, but hopefully that situation will change soon.
Of course the overall situation started with the Bosman ruling. There also used to be the rule in European competitions that you were only allowed to field 2 "foreign" players and the rest had to be homegrown. So that had a huge impact on the top teams developing their own talent. Once that was scrapped, that also opened the floodgates.