There has been some discussion here about ACF and term meta. I don’t know where this stands in ACF. There are some work-a-rounds that have been discussed here https://support.advancedcustomfields.com/forums/topic/how-to-use-wp-term-meta-on-acf-the-easy-way/ that might help you until ACF is transitioned to using term meta instead of options for storing the values.