SD Card Not Detected

I bought the B01 (https://www.amazon.com/gp/product/B084DSDDLT/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1) and I flashed the OS using instructions on this link (Sub Kit Nano Flash Process.pdf - Google Drive). I inserted my working micro SD card in the slot under the heat sink and it is not being picked up on Jetson’s side. When I open disks, my SD card doesn’t show up. Running dmesg and lsblk before and after insertion makes no difference which makes it clear that it’s not being picked up. I think I read it somewhere that you need to tweak some dts file but I’m not sure, Can you give me some clear instructions on what to do to enable the micro SD card slot?

Please follow the steps 1-9 of this tutorial and try to solve it.