A working solution to recognize a couple of pages scanned text (or photos with text) in Ubuntu 20:

# install tesseract
sudo apt install tesseract-ocr

# find module with the language you need
apt-cache search tesseract-ocr 

# Let's say we need german. Then we install
sudo apt install tesseract-ocr-deu

# Install GUI tool
sudo apt install ocrfeeder

The interface is relatively simple. It may require setting the default language in the settings.