How to perform Pathway enrichment analysis with mOTU output file?

I have performed shotgun sequencing data with q2-mOTUs and Metaphlan plugin which provides a OTU file. Now I have to perform pathway enrichment on this output but could not find any tool which is only using this file.
I went through Picrust2 but in this tool I need to submit OTU file along with representative sequence file. mOTU does not provide this sequence file so I am stuck here.
Kindly provide suggestions to analyze OTU file for pathway enrichment.