J7 Max will not receive the Pie update as the name isn't listed in the list of those devices which will be receiving the Pie OS.
Please don't think like that about Samsung. It's one of the most trusted brand and if you see, J7 Max was released in 2017, so I hope that it was later either updated to Nougat from Marshmallow or Oreo from Nougat. So, now it'll not receive the Pie update.
sb user agar complain kre gai tho syad update mile j7 max ko on max ko bhai sb koi samsung care main call kr ke force kre TB syad de isliya sb call kre Samsung care main kam kam 1 din pe ya 2 din pe TB wo prishan ho kr jaldi se update dena ka kosi kare gai bhai isliya ye no pe call kare 180057267864