I have been working on memorizing chords for a bunch of Standards and originals. It helps tremendously. A couple things that have worked for me:

Focus on the roots first. There are usually patterns to the ways the roots move: ii-V and Whole steps up or down are the most common.

Think in terms of Key-centers. Often, the bridges are simpler chord sequences, all in one key. A long series of ii-V-I will chunk these together.

Keep an eye at the smaller i-Vs that lead to key changes. These will help me tie the chunks together.

The goal is to solo over the tunes while playing saxophone. Finger the roots as I go through the progression. Instead of (or as well as) thinking “D-G” air-finger all 6 fingers down and then just the three left hand fingers…It gives me an additional channel of memorization.

Run through the changes in my head, without looking at the sheet music. Chunk series of changes, 2 to 4 bars at a time.

Whistle the melody line, and air-finger the roots of the changes.

Once I have it down, I listen to my favorite version of the song, and keep the pattern of the changes running through my head. I will restart many times to keep track, especially with Bebop.

Play through the changes , but SLOW….start with playing just roots…then gradually expand out to thirds fifths and sevenths, but make sure I keep track of the changes. I use ireal pro or musescore for this. Stop the player if I get lost.

I posted a break down of a song that shows how I go about memorizing it.