Date Time Replacement In IFTTT with settings and functions
If you need to use google datevalue, timevalue functions in IFTTT, you should change settings.
You can use arrayformula function without google script.
=ARRAYFORMULA(IF(A2:A<>"",TIMEVALUE(SUBSTITUTE(A2:A," at ", " ")) + DATEVALUE(SUBSTITUTE(A2:A," at ", " ")),""))