Need logs of payroll relationship group type fast formula

I have a issue where i'm trying to process an element using dynamic payroll relationship group and have run calculate payroll multiple times. But even with GMFZT enabled at default level i'm not able to print logs written in the FF attached at relationship group level. How can i print the logs of that FF in log file?

My requirement is that FF should check for that element entry between period start and end date and not on process date/effective date. Calc payroll flow calculates process date of that period and it passes that date to current FF via get_context(effective_date) but element entry is already enddated as of period end date and hence using relationship group FF element doesnt pick any person.