Are the input boxes in the same gallery item?
Try this:
Concat([galRECYCLED.Selected.TextInput6_1.Text, galRECYCLED.Selected.TextInput4_1.Text, ..all your fields comma separated..], Value, ",")
Update, added Value after table.

-------------------------------------------------------------------------
If this is the answer for your question, please mark the post as Solved.
If this answer helps you in any way, please give it a like.