EasyOS was created in 2017, derived from Quirky Linux, which in turn was derived from Puppy Linux in 2013. Easy is built in woofQ, which takes as input binary packages from any distribution, and uses them on top of the unique EasyOS infrastructure. Throughout 2020, the official release for x86_64 PCs was the Buster-series, built with Debian 10.x Buster DEBs. EasyOS has also been built with packages compiled from source, using a fork of OpenEmbedded (OE). Currently, the Kirkstone release of OE has been used, to compile binary packages for x86_64. Earlier releases of EasyOS compiled in OE are the Dunfell-series and before that the Pyro-series. They have also been compiled for aarch64 and EasyOS runs on the Raspberry Pi4.
Reproducing the release notes here, since 5.5.5:
Chromium 117.0.5938.132 compiled in OE — November 11, 2023
Fix for depth limit detection — November 11, 2023
EasyOS Kirkstone-series version 5.6.1 released — November 10, 2023
Fixed waiting for kernel video drivers to load — November 10, 2023
Automatic NVIDIA SFS updating — November 08, 2023
Kernel 5.15.137 and NVIDIA SFS compiled — November 07, 2023
EasyOS Kirkstone-series version 5.6 not quite released — November 06, 2023
OpenEmbedded revision-5 build with Firefox — November 03, 2023
Kernel 5.15.135 source SFS fixed — October 21, 2023
Fix Limine Installer search path — October 15, 2023
Fix build-rox-sendto was executing every bootup
Fix depth-setting in Easy Version Control link
Yes, a complete recompile in OpenEmbedded; "revision-5" and Chromium bumped from 116.0.5845.187 to 117.0.5938.132 and the kernel bumped from 5.15.135 to 5.15.137.