I really don't think Ings has been off form due to thinking about his future. He's been injured 3 times, had covid and a knackering schedule. Plus the team's bad run would have had an effect for sure. We all noticed Armstrong struggling after coming back from covid so that shouldn't be underestimated. I'm hoping Ings will come back after the international break being the player he was before his injury at Villa. He will want to go to the Euro's so he should be fully motivated to finish the season strongly. The prospect of a potential FA Cup winners medal could also help.
Yeah, there are a number of players who have been rather badly out of form for many weeks after returning from COVID. I'm not sure that's coincidental, and if choosing between that or Ings having given up on the team as the most likely culprit, I know where my money would go.