If you are not able to get them out with needle nose pliers then you are going to have to remove the valve cover and retrieve them. There is a chance that they will settle into a place in the top of the head that does not cause an issue but I would not leave them as the result could be damage to the engine.
Let me know if you have questions. I attached the process below for the right cover. Thanks
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Monday, March 22nd, 2021 AT 5:15 PM