My pixel 5 is currently running on grapheneOS and will be unsupported soon so I'm looking to switch over to CalyxOS for an extended support. Are there any other deGoogled OS's you guys recommend?
Your options in aftermarket OS fall in to 3 categories imao
those that support relocking the bootloader (grapheme,calyx,divest, other smaller projects maybe)
vanilla roms with signature spoofing permission so that you can have microg on them. Some even come with microg preinstalled (/e/,lode,Los4mg) And some are gmscomat compatible (voltage,awaken,spark). There are plenty but they don't care about signed images and relocking.
some unofficial build from any of the above from a maintainer that cares to sign his own images so that you can relock your BL as your device supports it.