I have recently upgraded my macbook pro to Big Sur OS and also got keyboard replaced. Its not an original keyboard. Both activities happened in about 2 days and now when i start my macbook, fan keeps running and cpu usage is high. I have uninstalled chrome, MS office apps, unchecked all folders from spotlight, logged out of icloud but nothing helped. Fan starts running as soon as apple icon appears on startup. I even tried to start in safe mode, command line mode but fan keeps running.
Can someone please guide me on steps to resolve this.
Adding screenshots of Activity monitor: