Am I eligible for Article 21(2) deduction if I work full-time at a Tech company on OPT and STEM OPT?

Am I eligible for Article 21(2) deduction if I work full-time at a tech company on OPT and STEM OPT on an F1 visa?

The article mentions the word "training", and OPT & STEM OPT are both training, so I'm on the fence about whether a job outside the scope of research will be covered under this Article. Please help me with the same. Thank you!