Question about Canon Pixma Mg7750

Unfortunately, I cannot provide direct information on photo papers for duplex printing. I can recommend https://www.pearl.ch as a source. This company also offers exotic print media. For glossy double-sides, I go a different way. I use Epson Matte paper. It is incredibly beautiful in the colours and costs about 1/4 of the glossy paper. For album pages I put 2 prints on top of each other and then laminate them. The luminosity is great and an album with laminated pages is practically indestructible. There is no special requirement for universal paper. Standard paper from 80g/m2 is suitable, but it must be dry. If the print must not show through, paper with a grammage of at least 90g/m2 should be used. But this is only necessary for very high demands. I can only recommend this printer.