As a defense of Garmin, even without reflective/transflective/whatever displays (which would be better in sunlight), they still manage decent battery life. I can easily go a full week without charging mine, or several days with a daily ~1hr activity which uses GPS. It's certainly nothing compared to the ~month I managed on my previous watch, but plugging it in during my shower every few days totally eliminates battery anxiety, so I'm satisfied.
replyPebble is back, with MIP reflective LCD. I have one. It's great.
replyBangle.js 2 (https://banglejs.com/) also has a transflective LCD. It's very fun product with a great community.
replyBangle.js 3 is being discussed: https://github.com/orgs/espruino/discussions/7341