The taekwondo Olympic tournament will take place from July 24 to July 27. The tournament has therefore been moved from its traditional place from the end of the Games to the beginning of the Games.
The easiest way is to follow the entire tournament on the Discovery+ service, which at least with Elisa is part of the Eurosport package. You can get it separately from the service's website.
If you have a VPN, yes BBC offers perhaps the best set of Olympians, especially with the British included over three days.
A small warning, if you plan to watch the races from beginning to end live, you must wake up early, the broadcast of the morning session starts at 3:55 and continues until 11:03. Evening session 12:55-16:33.
That's about 40 hours of taekwondo celebration! You can read the presets at https://tu11.fi/taekwondo/2021/07/olympiaennakko/.
Schedules, match times and results service at https://olympics.com/tokyo-2020/olympic-games/en/results/taekwondo/olympic-schedule-and-results.htm.