Hi Niklas,
I would suggest finding a screen on eBay to replace the damaged one, however, you need to buy one that comes with an LCD (not just the glass screen). This will probably set you back about £40-60, additionally you will need a heat gun, clamps for reseating a screen, tools to open a screen and the right glue to put it back on. If you have little experience in replacing screens this may be a hard job and could result in further damage to the device.
If you would still like to continue I have linked some screens I have found for you (these may be knock offs or be good i'm afraid it is hard to know) and I can aid you in the repair if you are wanting to do it yourself.
This one looks the best: [link|https://www.ebay.co.uk/itm/255899775307?_skw=Samsuing+Galaxy+S20+FE+replacement+screen&itmmeta=01JHAQFQ178E5379E505CJTEPG&hash=item3b94d0b14b:g:-5UAAOSwP4dkwNUv&itmprp=enc%3AAQAJAAABAHoV3kP08IDx%2BKZ9MfhVJKmdZrtrXKZF2e7r%2BXQVwpuePKxMQVVX6xvXOcSICFhFLWz0Uj1bBDTKB4T2EkB5DEuRpHpl9DLJ7SFzMQRDSj7AS2Wybpfb9TKymh3Cj2WDFpMI5cM%2FGN%2FCyZFxfkuSFp00E4trLBeqOeQwcUwVTbn4KtS%2FMwlSVu3ln7%2Fl9HO4Vha65owZ91%2F%2B1jHNrlbb1mymkqyitCtqOYUH9JVHkw8IQLSweaHHVnb62Doz5fkvsgq9unS%2B9qCFU4gL7N8%2Bm8qt1Rjo2n%2B2oUdhwjnvGEEGylpW94uxRejHKXAuMFrfCHYRUOdi81QndhaWPXd6PCU%3D%7Ctkp%3ABk9SR8LyvteKZQ|Link]
Others; [link|https://www.ebay.co.uk/itm/405327704392?_skw=Samsuing+Galaxy+S20+FE+replacement+screen&itmmeta=01JHAQFQ17P6KJG04VDVC6QVRD&hash=item5e5f69f148:g:AHkAAOSwO6JnKSBX&itmprp=enc%3AAQAJAAABAHoV3kP08IDx%2BKZ9MfhVJKmN1nYfdMT%2BjWU0DKjZA7zGcsN1G4Y8yK2EzCI2PiSZVLLyOscHjS%2FGf4hLQl2XA6GAPQ%2Fn2PTNTIJPzEKIl8CZJYyKc1WVeg7zB8cySiGqsV1S04AoRlsTtR0G%2BfhBhInOQlQad%2FokEDrg9c--fKZHkYKWKfUiMoMGNqevRW6S5ZS0SFdMH9WyUFhjFByzpKxX47ooDE9phQOtcJbJY3nUfxMoNcRX6jHFd01rWtoc2tfs0JNM4kyBbdfsn5F5R7pbyoPBmCIGvYjWxDnSIyRiqcGmestFvBSbR8TomsDVM%2BXwWGFZBTbQuohKKEFb8bc%3D%7Ctkp%3ABFBMwPK-14pl|Link 2], [link|https://www.ebay.co.uk/itm/145508093675?_skw=Samsuing+Galaxy+S20+FE+replacement+screen&itmmeta=01JHAQFQ174CAB92FG8875MW63&hash=item21e0f54eeb:g:0GkAAOSwOtZlgS~D&itmprp=enc%3AAQAJAAABAHoV3kP08IDx%2BKZ9MfhVJKmMKvRWuoYimBCbUwFcxo%2BwYAQVlt1QsaUF2tO5K%2FyyNh74%2FWEFGSwJZqFWv2x1U7Tm3IOzrR8hMCTVdSE0ZiCH6V3eUaa%2FYAALl7Ua5nYrHHi6VScQgj13WQwW4TM%2BnPpC5aPqfQxZvwzmckOfDN5hs2JokERqU4utkbHMJYA0gCBnNshMqUlv%2FJp%2F3uC0i35PpA1rWLxM9xppRrsB2jxyc83wdWEZMgtJdjLqUMc%2FSyntPboHpm%2FA0OODiLb4B4lV%2BMcuAPAJanMWcpxHC0Rs5QIHuE5yPOhPY9JxlYF5VQPbmIspk9ZEaDPxFFy%2FJK0%3D%7Ctkp%3ABFBMwPK-14pl|Link 3], [link|https://www.ebay.co.uk/itm/314994052964?_skw=Samsuing+Galaxy+S20+FE+replacement+screen&itmmeta=01JHAQFQ179JVXVXWBNV2TAVN5&hash=item49571bcf64:g:U-AAAOSwRZdlZaDt&itmprp=enc%3AAQAJAAAA4HoV3kP08IDx%2BKZ9MfhVJKlCOaVNbipLxY2RZnhUhNJmZ57MEpTa3tK8mU1zxkAEV6f3vTPrIcoqDvAaINbKFHBcM1Ef3yzUXX4HCBVfvHZ0LWEAm9EYaA1a4Y9kdU5Ko35fZ191Rr6PsYOhNvOZRwlJJBS9%2BOGv9RJDVi5dQR5vGzkwAXZxPotqpFlJqhrqzQVIH5rMNSMUKu6lSGXmti9JqLcEHgN84UqCVyy3sME8%2Fib1SPijaGIHZc36o4WziXREkskHloOnNJAqqGpWeQa78pEY6%2BYJ3ATrf1fY2kGu%7Ctkp%3ABk9SR8LyvteKZQ|Link 4]