Finishing a plugin for WordPress

Remote work for a web programmer. The search & plugin needs to be reworked; Filter Pro.
Functional provides filtering of records by slider with a range of values. You need to do the opposite – the ability to create a slider with a single value to search in the range between two fields.
For example, records have two ACF fields: a minimum term (term_min) and a maximum term (term_max).
On the filter slider, a single digital value (term) is selected and all records are selected where term_min < term > term_max.