Yes a lot of useful tools within Good Lock, I have used Theme creator a bit before but prefer Material You. Currently on a Beta though and does not usually work with that. Keys cafe gives additional keyboard options and Wonderland lets you get creative with your own Wallpaper for instance. Sime information here https://www.androidauthority.com/samsung-good-lock-1079882/
Good Guardians is separate and has useful features such as Galaxy App Booster, Battery Guardian,Memory Guardian and Media File Guardian. https://www.sammyfans.com/2022/05/19/download-samsung-good-guardians-3-0-and-all-modules/
I find particularly the Galaxy App Booster beneficial, claims that it boots performance by between 5 and 15%.
I do not work for Samsung or make Samsung Products but provide independent advice and valuable contributions.
My Device- S21 Ultra 5G ( SM-998B/DS ) CSC= BTU , 12GB/256GB
One Ui 5.0,Android 13 .