Let us start with the Z5II to update to V1.20 https://downloadcenter.nikonimglib.com/en/download/fw/601.html
Changes from “C” Firmware Version 1.11 to 1.20
Note: The changes listed below under “Still Photography”, “Still Photography/Video Recording”, “Controls”, “Displays”, and “Network” are detailed in the Supplementary Firmware Update Manual.
■ Still Photography
• Changed the available shutter speed range for [ISO sensitivity settings] > [Minimum shutter speed] in the [PHOTO SHOOTING MENU].
■ Still Photography/Video Recording
• Changed the following item names in Picture Controls:
- [Cloud Picture Control] changed to [Imaging Recipe].
- [Add Cloud Picture Control files] under [Set Picture Control] in the photo shooting and video recording menus changed to [Download Imaging Recipes].
■ Controls
• Added [On saving user settings] to [Save focus position] in the [SETUP MENU].
■ Displays
• Added [Automatic monitor display switch] to the [SETUP MENU].
■ Network
• Added [Wi-Fi Always ON] to [Connect to smart device] > [Wi-Fi connection (AP mode)] in the [NETWORK MENU].
• Added [Inactive connection timeout] to [Connect to FTP server] > [Options] in the [NETWORK MENU].
■ Other Changes
• Aperture is no longer restricted when recording videos in mode S (Shutter-priority auto).
For the P1000 is there firmware v1.90 https://downloadcenter.nikonimglib.com/en/download/fw/604.html
Changes from Firmware Version 1.8 to 1.9
• Fixed an issue where, in rare circumstances, the camera would stop responding when adjusting zoom during burst photography.
