I know people working at Lockheed Martin and there is not even a rumor about block 70 for Pakistan. Whoever spreading the news is either sitting in corporate offices of Lockheed Martin and doing the negotiations or just a YouTuber trying get some views.
As far as I know there is no news about new F-16 block 70 deal for Pakistan, nothing from Pakistani Embbacy in DC. As I have mentioned before, CFC will be released to Pakistan and Trump/Pentagon might allow used/surplus F-16s but that depends on peace in Afghanistan and what role Pakistan play in it.
There is nothing written on the stone, things are constantly changing.