Unable to Establish BLE Connection Between nRF52833 and Mobile/PC

I am working on interfacing BLE between my nRF52833 device and both a mobile and a PC. The advertising process is functioning correctly; however, the connection is not establishing. I am using the "BLE Mouse HID example code" from the Nordic SDK, and the behavior is the same with my own implementation and the example code.

I would appreciate any guidance or information to resolve this issue. Additionally, if you have any working code or examples for establishing a basic connection between the device and a host (mobile/PC), please share them. And i have attached some screen shots from the nrf conmnect mobile app for the reference.

if any other information required please let me know.!

Thank you!

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