Hi @jondeaux
Chances are that the screen will have to be replaced.
If you decide to replace the display ensure that you get the correct display for your ''particular'' model. Just saying this because you selected the S23 FE as the device but stated only S23 in your question.
There are 4 different S23 variants i.e. S23 (SM-S911B), S23 FE (SM-S711B), S23 Ultra (SM-S918B) and S23+ (SM-S916B) and they all use different displays (the displays all have different part numbers so presumably they're not the same as each other.
If you have the S23 model then here's the ifixit [guide|175309] guide that may help.
If you have the S23 FE model then here's a teardown [https://www.youtube.com/watch?v=ljb0vG3P5WE|video] that may help.