The best situation today is that Poland and Wales got a big win and of course this is a good thing before they meet because this will certainly bring some positive impacts, especially in terms of mentality and a strong desire to win.
I think the current situation allows an interesting thing from the match later because although in terms of statistics Poland can always win against Wales but of course Wales also does not want to repeat the defeat again and again especially when their spirit is very good now after a big win against Finland.
Wales no longer have Bale and Poland had Lewandowsky but the striker is older and if in previous tournaments (World Cup, Euro) he could no bring Poland to far, it is unrealistic to think he will be able to do it in Euro 2024.
I don't feel World Cup or Euro will lack of something if Poland or Wales can not join it. They are not strong and competitive enough to go far in World Cup and Euro. Wales even did better than Poland in latest Euro tournaments.
A single striker and already old like Lewandowsky can not easily help his team to win if he does not receive enough good support from his team mates