In my opinion, there is no strict rule about who should pay on a first date. Traditionally, many people believe that the man should pay, but modern perspectives focus more on equality and mutual respect.
I believe it depends on the situation — for example, if one person invites the other, they can offer to pay. However, splitting the bill is also a fair and respectful option, as it shows independence from both sides.
At the end of the day, what matters most is comfort, understanding, and clear communication between both الأشخاص.