Subjunctive after "no sé"

I always thought that you're supposed to use the indicative after "no sé" but I'm watching Love Is Blind México and it seems like every time they'll use the subjunctive. Some examples I've observed:

• "No sé si tengas por ahí un regalito."
• "No sé cómo vayas a reaccionar"

Is this standard and are there situations where you should use the indicative after "no sé..."?