Why isn't Verizon FiOS 75/75 in my area, but 150 is?

I really want to get 75 mbps download, 75 mbps upload. I noticed this option is not available anymore on the website. Last year the option was available!

Could it be a bpon ONT issue? I know if I upgrade to 150mbps then I'll get a gpon. Is this the reason why 75 isnt available?

Please let me know what can be done.