Is there a way to publish a BAQ parameter to a field label?
Not that I know of. The grid is rendered before the parameters are sent in.
You can simply add a calculated for each of them where the field is just the parameters. Then when you get it to a dashboard you can hide the columns, and show those values on a tracker view.
You could also change the Grid Labels in a Customization AFTER you get it to the Dashboard like @Banderson suggests but you would need an event to hang it on.
Are the BAQ parameters visible to a BAQ Report? I’ believe the Options created in BAQ Report Designer are, but don’t know about the params from a BAQ
Say you wanted your report to have columns based on params like the OP’s example.
Expense 2019 2017 =============== ========= ========= SHOP SUPPLIES $1,234.56 $ 786.54 UNIFORMS $2,345.00 $3,200.12
With those two columns being the totals for the years entered in the BAQ Params