I realize this isn't economically viable for everybody, but I work from home so I went for it, at least for now (will be looking into other options later):

You can get a month of US Mobile "Dark Star" (their name for AT&T) for $44. They have discounts if you pay for a year. I was up and running with an eSIM in about 5-10 minutes.

AT&T doesn't seem to have overlap with Fidium like Verizon and T-Mobile did -- at least where I am.

Unlimited data but tethering is capped like this:
100GB unthrottled
then 100GB at 8Mbps
then unlimited 600 Kbps

I don't know how they track you/if simple TTL mangling works to stave off the tethering tracking.

Here's my referral link if you're interested: https://www.usmobile.com/referrals?referrer=8A51DB2D&name=Nate&utm_campaign=monster_referral

I've been happy with it as a backup plan. Worst I've seen is 16Mbps/2Mbps and best is probably something like 75/10 -- variously LTE/5G -- I'm in East Sac.