GeoTools is mainly used to manipulate projection.
Coordinate order behavior differs between usage of gt-epsg-hsql or gt-epsg-wkt.
There is no way to manage standard lat,lon for EPSG:4326 with gt-epsg-wkt.
So, gt-epsg-hsql is used as java -Dorg.geotools.referencing.forceXY=true may allow non standard lon,lat order.
As the validator requires Java 11, GeoTools 21.x and above is supported.
See Geotools - Java Install for more details.