AMBOSS and UW phrase it in terms of "suicidal thoughts". Moreover, saying "becoming..." kind of gives the answer away (narrows it down a lot).
AMBOSS: "Antidepressants increase the risk of *suicidal thoughts* and suicidality in children, adolescents, and young adults < 24 years with major depressive disorder." (they're wrong about the age-- it should be 25-- but not relevant)
UW: "...studies showing a slightly increased risk of *suicidal thoughts* and behaviors (not completed suicide) among a small group of child and adolescent patients treated with antidepressants compared with placebo" (Step 2 - id:7289)
https://next.amboss.com/us/article/_N05dg?q=Patients%20%3C%2025%20years%20old%20have%20a%20slightly%20increased%20risk%20of%20suicidal%20thoughts%20when%20initiating%20antidepressant%20treatment%27#MHbMIE