Here is a recommendation: Convert to equal angle projection

EPSG:4326 for each UTM zone. Over sample to make sure you dont lose resolution and use nearest neighbor. Then merge both into one and then triangulate. I am not familiar inpho software but will assume it can read different raster projections.

Hi, simply reproject on the same fuse pictures from the other fuse (from EO file); triangulate ad adjust. Finally reproject entire orthomosaic on desiderate fuse. Is Always possible reproject and triangulate pictures coming from crossing fuses.

thanks Reuben Reyes for answering

thank you Marco Baldo