Cannot boot from SD on Convergence 3 GB model

[dukla2000]

...
fdisk -l and lsblk on the phone do list the SD card.
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What do you see? My phone is running arch from the eMMC (/dev/mmcblk2) and has Mobian installed on the SDcard (/dev/mmcblk0) below:

Code:

$ uname -a
Linux duklapp 5.16.1-2-danctnix #1 SMP PREEMPT Tue Jan 18 22:10:53 UTC 2022 aarch64 GNU/Linux
[csn@duklapp ~]$ lsblk
NAME         MAJ:MIN RM  SIZE RO TYPE MOUNTPOINTS
mmcblk0      179:0    0 29.8G  0 disk
├─mmcblk0p1  179:1    0  504M  0 part
└─mmcblk0p2  179:2    0 29.3G  0 part
mmcblk2      179:32   0 29.1G  0 disk
├─mmcblk2p1  179:33   0  128M  0 part /boot
└─mmcblk2p2  179:34   0   29G  0 part /
mmcblk2boot0 179:64   0    4M  1 disk
mmcblk2boot1 179:96   0    4M  1 disk
zram0        254:0    0    0B  0 disk
[csn@duklapp ~]$ sudo fdisk -l
Disk /dev/mmcblk0: 29.81 GiB, 32010928128 bytes, 62521344 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x26185598

Device         Boot   Start      End  Sectors  Size Id Type
/dev/mmcblk0p1 *      16384  1048575  1032192  504M 83 Linux
/dev/mmcblk0p2      1048576 62521310 61472735 29.3G 83 Linux


Disk /dev/mmcblk2: 29.12 GiB, 31268536320 bytes, 61071360 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x8bbaad07

Device         Boot  Start      End  Sectors  Size Id Type
/dev/mmcblk2p1 *      2048   264191   262144  128M  c W95 FAT32 (LBA)
/dev/mmcblk2p2      264192 61071359 60807168   29G 83 Linux