This app was mentioned in 10 comments, with an average of 1.30 upvotes
Even if there are no ways to take smaller photos, there are plenty of apps which will let you shrink the photos after they're taken. E.g. if you need to share/email smaller photos, I really like SendReduced. There are also likely apps that will reduce all photos on the device to save space, although I don't know/recommend any offhand.
I'd recommend
https://f-droid.org/en/packages/com.jarsilio.android.scrambledeggsif/
or
https://play.google.com/store/apps/details?id=mobi.omegacentauri.SendReduced
If you also want to resize images.
Send Reduced can do this.
https://play.google.com/store/apps/details?id=mobi.omegacentauri.SendReduced
Send Reduced may do what you want.
Try Send Reduced. Also available on F-Droid.
Send reduced works really well. https://play.google.com/store/apps/details?id=mobi.omegacentauri.SendReduced
Send Reduced will lower the file size, but it is intended for sending images by email (only).
https://play.google.com/store/apps/details?id=mobi.omegacentauri.SendReduced