MariaDB Replica Read Utilization is very high

Hi Team,

We have found that on our MariaDB Version 10.11.5 read requests are very high as per iostat & iotop command but in mysql processlist.

I can't see any queries coming to it and even no-one is executing any queries to it.
The Server on which we are facing this issue is a read replica of another MariaDB Server.

Both server version is identical.
And on Master DB i can see read & write is under control even though that DB is serving the live requests.
While on Read Replica we are observing high read requests from MariaDb
Please find attached screenshot.