The fact that it freezes about 5 seconds after reaching BitLocker recovery is especially important because it limits the usual Windows repair options.
With the Surface completely off:
Hold Volume Up.
While holding Volume Up, press and release Power.
Keep holding Volume Up until the UEFI screen appears.
If UEFI stays stable and doesn't freeze, that's encouraging. It suggests the basic hardware is functioning and the problem may be Windows/boot-related.
If UEFI itself freezes, then I'd be considerably more concerned about a hardware problem.
. If UEFI works, try a USB Windows recovery environment.
Your BitLocker recovery screen means the drive is encrypted. You will probably need the 48-digit BitLocker recovery key to access the Windows installation/data.
If you used a Microsoft account on the Surface, check Microsoft's BitLocker recovery-key page from another computer:
Find your BitLocker recovery key
A computer can appear "dead" while the SSD and your files are perfectly intact. The fact that BitLocker recovery appears is actually evidence that the machine is getting fairly far through the boot process.