Yes you can delete or deactivate everything you want and you can reinstall it if you need or want ( I am on a rooted phone ).
Here I've deleted the Apple and Mozilla server for geolocalisation. The 3rd screen capture is after the reboot ( "redémarrage" ). And the MicroG Framework proxy ( because I won't use an ap that use googlecloud ) after reading this https://microg.org/
I've changed Qsms for Chomp SMS.
I've uninstalled the email default ap ( I use tutanota and protonmail ),
uninstalled aurorastore and F-droid ( I use only APK ),
AudioFX, magnetophone, music, radio FM ((musicolet is complete with a good EQ , I don't listen to FM radio, LexisAudio to record sound ),
open camera ( I prefer HedgeCam ),
weather, agenda, carnet, pdf viewer plus ( I use some good websites for the meteo, another open source agenda agenda, Safe Notes, Xodo Pdf, Collabora Office ect... ).
Before to use Iodé Os I've made my own degoogleised Lineage Os 18.1, on my sony Xperia X ( it was a big waste of time, but I've learned a lot ), it took time for a newbie to understand servers used to geolocalisate your mobile, then how to change them ( you need to type line in a console ).
Then I used AF firewall to block every GAFAM **** ( but I missed a lot of url for sure, the iodé blocked urls list is 20 times bigger than my old one ! iodé ap is better than AF firewall because of this native list).
It took one month for me to ( baddly ) degooglise my lineage os 18.1 on Xperia X, so when I've changed my phone for a USB-c one ( Sony XA2 - I need to record sound with a USB-C Rode AI soundcard , Xperia X is not compatible cause micro-usb ), I search for a predegooglised exploitation android compatible system on XDA... and tried iodé os, and kept it.