I think you would need to reball the eMMC for those clam sockets to get reading on the eMMC, so once again applying heat to the eMMC.
What I did with mine is that I went ahead and upgraded the nand to 256GB on my OLED switch but I didn't want to cut the SoC frame nor did I want to redo the whole process of soldering the original eMMC back onto the OLED switch to get a backup (I needed the backup to restore on the new upgraded nand). So instead, I resoldered the original eMMC onto a v1 switch board and used an eMMC reader I got off aliexpress to make a nand backup in ubuntu. So that's my long winded way of saying you can get a copy of the nand backup on the eMMC if you resoldered it back onto a v1 board and use a v1 switch with hekate to grab the backup.
It's like the perfect time to upgrade the nand once you have it off.