not gatekeeping, just advice, get the best olive oil you can, ideally from a shop you can taste it. And good zaatar is hard to find, avoid any from Walmart spice rack, chances are they replaced the actual zaatar herb (Hyssop in English) with oregano. Most of their food are cheap ingredients so those two key ingredients are important.

if you try Palestinian cooking with low quality oil and oregano instead of zaatar you'll get something that tastes nothing like it's meant to taste that.