@ballofconfusion I vote to keep in daycare. If you feel that daycare isn't enriching enough, you can supplement at home. Take her to read alouds at the library, look into pre-k programs at museums, read books with her about all kinds of subjects. You can also look up phonics and math games for older toddlers and play those with her or she can play on her own on a toddler appropriate tablet.
At this age, kids love seasonal stuff. That's what a lot of preschools do to help children learn the calendar, seasons, and progression of time. Schedules are great, along with family calendars. Involve your child in season prep. Pumpkin painting at Halloween, winter decorating during December, planting flowers in the spring, making popsicles in the summer.
And another thing would be fine motor skills. If your daycare doesn't specifically teach fine motor skills, spend some time in the evenings/on weekends coloring, painting, doing crafts, and maybe get one of those old shoelace boards.
Finally, developmentally-appropriate chores are a good thing to add for 3 year olds. Help set and clear the table. Give them a little microfiber cloth and they can "dust". Teach her to help wipe up her spills. She should also be cleaning up her toys when playtime is over. If she can carry something and walk at the same time, she can put stuff away. That will be a big help in kinder.
Edit to add: If your daycare doesn't do this please teach your child to put their jacket/coat, hat, and gloves/mittens on THEMSELF. This is a HUGE help to your child in kinder!