Rangers are one of several teams who are being watched by UEFA for potential financial fair play breaches.
The governing body for European football is wanting to crack down on clubs across the continent overspending and is imposing a break-even requirement on those who compete in their competitions like the Champions League, Europa League, and Europa Conference League. This means they should not spend be spending money than they take in over a certain amount of time but even after a Covid adjustment was made to give clubs some leeway, a number of top clubs didn't fall into line with rules.
Monaco, Marseille, Besiktas, AC Milan,. Juventus, Inter, Paris-SG and Roma were all fined by UEFA. PSG was hit hardest with a big €10million fine given to them while Monaco got the €300,000 equivalent. Rangers haven't been hit yet but their financial dealings will be monitored closely by UEFA.
