Use the lv_font_conv tool to convert the ttf file into the C array code for LVGL, but the kern table information is missing.

[yinqiwu]

I attempted to conduct a test using this open-source font library at https://github.com/liberationfonts/liberation-fonts. I used the ttx command to check and found that all these ttf files contained kern table information. However, after converting them into c files using lv_font_conv, the description information of kern_dsc was NULL. I tried several versions of the lv_font_conv command using npx, and I discovered that it was impossible to generate a font library file with correct kern information. Are there any prerequisites for using lv_font_conv to convert ttf files?