It can be seen that the BNB smart chain grows with more projects, gas fees will increase. Another point is that these said gas fees depend on the price of BNB. It's part of their business, but they'll probably make it at least relatively cheaper than competitors like ETH.
On the other hand, the number of users increases, and the number of transactions is constantly increasing. So Blockhain becomes overloaded and fees have to increase.
A few hours ago I sent BNB tokens to Pancake and I didn't notice there was a significant increase in the cost of BNB gas, I think it is natural for an increase to occur, but if the increase is too large like Ethereum it will certainly make people choose other coins because now there are many alternatives to send cryptocurrencies