Is this the latest available Win 10 Pro 64-bit update?

Computer Type: Laptop
System Manufacturer/Model Number: ASUS X54C
OS: Win 10 Pro 64-bit
Memory: 6 GB
Internet Speed: DL up to 10 Mbps
Browser: Chrome

Computer Type: PC/Desktop
System Manufacturer/Model Number: Custom Self-build
OS: 64bit Win 10 Pro ver 21H2
CPU: Intel Core i5 3570K 3.4GHz
Motherboard: ASUS P8Z77-V LX
Memory: 16GB
Graphics Card: NVidia Geforce GTX 750Ti
Sound Card: On-board Realtek HD Audio
Monitor(s) Displays: Samsung 226BW
Screen Resolution: 1680 x 1050
Keyboard: Microsoft wired Keyboard 600
Mouse: Microsoft wired Basic Optical
PSU: Corsair TX550
Case: Gigabyte IF233
Hard Drives: 1TB SSD + 1TB HDD
Browser: MS Edge
Antivirus: Windows Defender

Computer Type: Laptop
System Manufacturer/Model Number: Microsoft Surface Laptop 3
OS: 64bit Win 11 Pro ver 21H2
CPU: Intel i5 1035G7
Memory: 8 GB
Graphics Card: Intel Iris plus
Screen Resolution: 2256 x 1504
Browser: MS Edge
Antivirus: Windows Defender

Computer Type: PC/Desktop
System Manufacturer/Model Number: Home built
OS: Win 10 Pro 64bit (1909)
CPU: Intel i7-5820k, Cooled with Corsair H115i Pro liquid cooling
Motherboard: Asus Sabertooth X99
Memory: 64GB DDR4 3200 Crucial
Graphics Card: Radeon R VII by Xfx
Sound Card: Onboard audio, Corsair SP 2500 speakers and subwoofer
Monitor(s) Displays: ASUS 2K monitor, 32"
Screen Resolution: 2160 x 1440 at 60Hz using DisplayPort 1.2
Keyboard: Thermaltake Poseidon Z illuminated keyboard
Mouse: Corsair M60
PSU: Corsair 850ax fully modular power supply with sleeved cables
Case: Thermaltake P5 with 4x140mm fans on front radiator
Cooling: Corsair H115i Pro liquid cooled CPU with 4 x 140" Corsair ML "push-pull" and 3 x 140mm fans
Hard Drives: Samsung 970 EVO 500GB M.2 SSD (system drive) WD 6 TB Red NAS hard drives x 2 in Storage Spaces (simple redundancy).
Internet Speed: 85MBps DSL
Browser: Chrome and FireFox
Antivirus: Windows Defender, Malwarebytes Pro and CCleaner Pro
Other Info: Running Windows 10 Pro, Version 1909