The lack of filesystem suggests the image is not a mountable disk but a memory-mapped firmware image. Future work includes disassembly of extracted ARM code to identify hardware targets. The filename pattern ioprp*.img may indicate a series of related firmware versions.
Below is a you could adapt once you identify the actual contents of the file. Sample Paper Title: Analysis and Forensic Reconstruction of an Unknown Disk Image: A Case Study of ioprp252.img ioprp252.img
To help you effectively, I’ll make a reasonable assumption: could be a disk image , ROM dump , or virtual machine image — possibly from an embedded system, retro computing environment, or proprietary hardware. The lack of filesystem suggests the image is