No Expeditions?

Hi everyone! I’ve been playing Pikmin Bloon since July. Since maybe around August, I have noticed that I do not get expeditions UNLESS I use the detector. My boyfriend, who takes a similar amount of daily steps as me does, and I’m positive that I have the required permissions granted to the app. What am I doing wrong?

Also, I’m not sure if this is related, but my phone’s pedometer seems to be off by as much as ~1-2 thousand steps on some days. I know this because I’ve gone hiking with my boyfriend and we will have drastically different step counts.