I have not received Ads for more than a week

Hello to all the excellent Brave community!

I have an incident, I have not received Brave ads from my mobile for more than a week. Normally I received quite a few ads on a daily basis.
I have checked that the buttons for the Brave Rewars ads are activated.
Brave version: 1.12.113
Mobile model: Xiaomi A2
Operating System: Android 10
Country Spain

I would be grateful if you could help me solve this incident or at least know if it is a generalized incident.

Thank you very much,