Let me empathize the question better: as in restaurants adding a surcharge imposed towards customers just because the logistics of bringing in the ingredients to cook dishes is being impacted (usually come in bulk from supply trucks) alongside the cost of fuel going up.
I know its the same thing for rideshare (as drivers need gas, so they charge passengers more on the app for this reason). In my country, they added a 5% surcharge for customers who dine in at restaurants and 10% for food deliveries, which is just ridiculous (but I get it).
I mean, my country has it’s own oil reserves but whether they’ll be used during this time remains unclear, and they’re kind of seldom on exporting that towards the global market since for the most part, crude oil is imported from the Gulf states (like Oman or Kuwait).
Fuel is a tiny cost of restaurant meals. It isn’t zero, but it is much less than 5% of the costs. So even if prices are going up, it is easy to hide them in the profit margin in the short term. Long term of course it affects more and more things indirectly and eventually something will give and raise prices forcing something else to give.
If you think a 5% jump in operating costs isn’t going to kill most restaurants, you may not understand the thin margins they work with.
A 20% jump in something that is only 5% of costs is not a 5% jump. It will hurt but not kill most.