Re-downloading onto PS4 Pro

Hopefully this is the right place and hopefully someone remembers.

A while ago my game was installed on my PS4. It might have been a new expansion or something but PS4 pro users had an issue and had to uninstall all their data and then do a clean install.

I bought the FFXIV ARR/Heavensward physically then every expansion after was digital.

Ever since then i've had to use my disc to play as i can't for the life of me figure out how to reinstall it back onto my PS4.

Only reason im asking is because my disc is starting to give up the ghost and won't work at times and if i can reinstall onto my PS4 it will save me some money and allow me to keep a second game im playing in my disc drive.

If anyone is able to help or point me in the right direction that'd be great.

Signed, Desperately Seeking Discless