A while ago, a series of Tweets from a smartphone case-maker presented the possibility that the Samsung Galaxy S10 and S10+'s fingerprint reader placement would make using screen protectors on these phones much more difficult than normal. Now, a 2nd accessory firm has released a video reiterating this line of speculation.
https://www.notebookcheck.net/New-leak-re-visits-Samsung-Galaxy-S10-s-potential-screen-protection-issue.410006.0.html