While you’re in there it probably wouldn’t be a bad idea to throw in a little UV dye so if there’s a leak in the future it will be easier to find.
Also, small car A/C systems usually struggle when it’s super hot outside. My little Echo has good air, but really hot days tax it. My GMC truck on the other had will blow cold regardless.
Another thought, change your cabin air filter too. A dirty filter won’t help the system at all.