HolyKeebs just announced their new keyboards with integrated trackpoints: https://holykeebs.com/pages/trackpoint . Something they do that is really cool is build them into the microcontroller itself, so if your board has the microcontroller in a convenient place, you can add the trackpoint straight to an existing device (already sell it for pimoroni trackballs, trackpoint in Q3). I have a Corne from him with the pimoroni, and I enjoy it, but the pimoroni is not a full mouse replacement for me.

I know there's a small I2C module you can get with a miniature trackball like the ones that were popular on certain models of blackberry phones around 2010 or so. I found it being sold on pishop, but the silkscreen on it says its made by pimoroni.

There’s a more active discussion in the ZMK discord on pointing devices: https://discord.com/channels/719497620560543766/845285481888743434 or click the discord link on https://zmk.dev/ See also the trackpoint_builders subreddit.

My personal bias is still using a separate trackpad, but have thought about doing something like a cirque with haptic feedback.

Another option is the cirque touchpads. I've not tried them but they are popular and people find them usable enough as an actual replacement primary pointing device, which isn't the case with things like the pimoroni trackball, etc.

Trackpoint? You mean the clit mouse.

Beekeeb announced getting a mini trackpad working

https://beekeeb.com/cirque-trackpad-i2c-on-corne-keyboard/

check out https://www.reddit.com/r/trackpoint_builders

I've had a few different boards with integrated pointing devices now. The Dilemma from Bastardkb, the charybdis nano from Bastardkb, and Frigate from keyboard dweebs. End of the day, they're nice but can't compare to split + apple magic trackpad for me personally. The alternatives feel like I'm giving up so much fine control and surface area for not much gain.

On that note I do have some of those boards still I can sell for pretty cheap if you're interested.