partitioning - USB UDF is there a way to format to Fat32

I found a old USB that has two partitions. One is Fat32 and the other CD Drive UDF.
I can't seem to find a way online on how to delete a UDF partition. So maybe here I can find a possible solution?

Fat32: 800MB
UDF: 40 MB
Total USB should be 2GB

I already tried using the disk manager. But I can't find a way to format the UDF partition.

Thank you for your time!