Last season was a historic one for Newcastle, they are going to be playing in the CL next season, and by extension in 4 different competitions. It is definitely going to be an interesting season for their players, but if they do not strengthen their squad, they would struggle quite a lot, and could prolly not finish in the top four, or go far in the cup competitions.
Having said that, they have the money and now they have achieved something capable of alluring quality players, i think Newcastle are going to be pretty busy in this transfer window, a few quality players in important departments of the team is what they need and they would be ready to go again next season.
Newcastle United success wake up from bottom position last two season until leaded on top fourth standings position in this season for qualifying to Champion League next season. Remember, last two season before Newcastle acquisition ever dropped to relegated and arrived Eddie Howe success made Newcastle finish on 11th standings in season 2021/22. Drastically have bigger impact not only from acquisition but how brilliant and smart strategies from Eddie Howe until give Champion League ticket after Newcastle finish on top fourth standings in this season.
Honestly, Newcastle United has much money in this season but they don't look spent more for active in window transfer, depend with Chelsea, Newcastle United not really spent much money in window transfer but success finish on 4th standings.