MySQL Search in string column (full-text applied on item) with multiple values separated by "|" using regexp or another mysql function

Question

How to full-text search in MySQL database in a column as string type with multiple values separated by ","

For example: mysql_column -> ids: "FE,BE,PY", "FE", "FE_1"

Usign regexp function (or another mysql function), get only rows where ids column contains that IDs (only full values): "FE"

expected outcome:(2 rows) rows1: "FE,BE,PY", rows2: "FE" without "FE_1"