believe that no tattoos anywhere on the body are allowed if employed in the sandpit.
not true. Some airlines have stricter rules than others, and they differ between cabin crew and flight crew. But you absolutely can have tattoos with several of the major ME carriers, so long as it's not visible in uniform.
Of course some get their tattoos AFTER joining (but still in a place normally covered by the uniform)
Qatar I think is the only one that doesn't like the tattoos, but again I think this is only for CC and on a case by case basis (they must submit a photo of the tattoo and mark on a diagram where it is located) Not sure what QR does about pilots