The airlines people are using, have either stopped flying to Beirut, or they don't reach Jordan, and if they do reach Jordan or Cairo, nevertheless the rest would be up to the travellers themselves, and it is pretty difficult to get a ticket from Cairo or Larnaca for example to Jordan and then to Lebanon, difficult maybe not, very expensive? Definitely.
I was checking the prices of some tickets, let's say someone would think they would go to Jordan and take a car to Lebanon, or fly to Cairo, then to Amman and then to Lebanon by car or plane... The plane tickets are 1500$ and up, they even surpass 2000$.
I even heard that going by car from Jordan to Lebanon, is costing people around 1000$, and from Syria to Lebanon around 400$. Now I am not sure if it is still the same after the war or not.
Moreover it could be also due to the fuel's price increase, but this is still outrageous.
Below is an image taken from this post. The picture is really touching.