The Home Office no longer issues physical BRPs in the same way they used to. All physical BRPs now show an expiry date of 31/12/2024, regardless of your actual visa duration.
We recommend prioritising the setup of your eVisa instead. See the link here to help you navigate the transition to an eVisa.
To apply for an eVisa, you will not need your physical BRP. You will only need your valid passport and your visa application number - this is a global web form (GWF) number or unique application number (UAN).
You can find this on Borderless by going to Visa Applications > View Visa Granted Confirmation. The GWF number is also usually in the subject line or body of the email sent by UK Visas and Immigration after you submit your application.