Is it possible to buy a food-tray for the baby and install it where the bumper bar is? Does this accessory exist for this stroller? And will I be able to get a cup holder for parents and attach it to the buggy somewhere too?
I'm sorry I'll disappoint you, but the Joie Pact Lite doesn't offer a fitting food tray for the baby accessory. You can always buy a universal organizer (of any brand, no need for it to be exactly Joie), and keep stuff there, but it won't be where the baby is, sorry.
About a cup holder, there's also not an original Joie drinks holder available. On the other hand, again, you CAN simply purchase a universal one that fits pretty much any stroller. My suggestion would be to get a Skip Hop OR Diono OR... simply check Amazon's cup holders, there's so many uni ones 😉
Do keep in mind that this is a cheaper buggy, and the price does reflect all the features and possible accessories as well. Do help yourself with the universal ones and you'll be fine ;-)