Software engineers are usually not tracked hourly. There are common exceptions such work done for government programs, or contracting. Even in these scenarios, hours are not usually tracked by any authoritative system. In the end, the only feedback you get is based on softer metrics like availability during business hours, or on time completion of work.

In my experience, lots of engineers will show up far after 9 AM and leave well before they have reached a full day of work. Its a very privileged system that exists because it is so hard to hire engineers. At least for now.