Failing to boot to pop os after installing clear linux

Hello there,
Previously, I had Pop os on my system.
I chose to try the clear linux.
After installing clear Linux is booting well.
But my pop os is not disappeared.
I chose the advanced option by naming the partitions individually where i chose the CLR_BOOT as the one which had pop os boot files. I am not sure if it formatted the efi partition.
When I checked my bios, I can see pop os listed but not clear linux. But when i click that pop os in bios, i enter into clear linux. ( Clear Linux is working).
How do I get back pop?