I don't have SD card reader for my computer, so maybe I could do it directly from termux instead.

How to resize SD card without losing data? And make new EXT4 partition.

(parted) p:

Disk /dev/block/mmcblk1: 63.9GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number  Start   End     Size    Type     File system  Flags
 1      1049kB  63.9GB  63.9GB  primary               lba