Yes, in version 18 of Endevor the FROM Environment can be wild carded. The List action will read the environments as listed in the C1DEFLTS table.
EXAMPLE of SCL:
LIST ELEMENT '*'
FROM ENV * SYSTEM * SUBSYSTEM * TYPE * STAGE NUM *
TO DSN 'XXX.XXXX.XXXX' MEM 'LISTWHE'
BUILD ACT RETRIEVE
WHERE TEXT 'TEST'
OPTION REPLACE SEARCH .