Mine is same as yours,f14. I've checked a number of times during the day. Two other computers running Retail 10 have updated past the version we have. I was glad to hear it wasn't only me.
I already answered your question. There is no longer a free Insider version. I don't care how many times you ask, it's not going to change.
Bingo. That train left the station a long time ago and it's not going to happen again. Ya want 10.. buy a copy. All other methods are not subject to discussion here.
Computer Type: PC/Desktop System Manufacturer/Model Number: Paradigit OS: Windows 1.00 to Windows 11 Pro 64-bit Build 22000.194 CPU: Intel Core i7 11700 Motherboard: Asus PRIME B560M-A Memory: 16GB DDR-4 Graphics Card: ASUS GeForce GTX 660 Sound Card: On board audio (Realtek) Monitor(s) Displays: Dell 2707WFP Screen Resolution: 1920 x 1200 Internet Speed: 500Mb/s Browser: MS Edge Antivirus: Malwarebytes, lifetime licence
Source: Announcing Windows 10 Insider Preview Build 10525 | Blogging Windows
How to Start or Stop Receiving Insider Builds in Windows 10
How to Check for and Install Windows Updates in Windows 10