After further inspection the club database and player database were not using same name for given club. i.e "Newcastle" not equal to "Newcastle United" & "Sevilla" not equal to "Sevilla FC".
Should note that all countries take the same number of players (26) to the World Cup but I've only used plotted players that come from the top 6 global leagues (debatable to include MLS I know).
d0xical OP t1_ixm0phk wrote
Reply to comment by bokilala in [OC] What leagues do players that make up the 2022 World Cup Squads play in? by d0xical
After further inspection the club database and player database were not using same name for given club. i.e "Newcastle" not equal to "Newcastle United" & "Sevilla" not equal to "Sevilla FC".