Recent online login activity

At&t does not record that in your account. 

Another question...is there a way to tell if more than one sim card is being switched out on a phone? On my online account it shows the phone as a good pixel 5 and the phone is actually a Samsung note s20. 

If they SIM card was recently swapped on the phone, the IMEI should eventually correct an AT&T system and then show the correct phone.

Thank you. It actually never shows the correct phone on AT&T. It either shows Google Pixel 5 or "unknown device". 

We're both devices purchased from AT&T? Or are AT&T branded devices?

If not purchased through at&t, the device will be 'unknown'.