bubble under the radar

US /ˈbʌbəl ˈʌndər ðə ˈreɪdɑːr/
UK /ˈbʌbəl ˈʌndər ðə ˈreɪdɑːr/
"bubble under the radar" picture
1.

estar bajo el radar, pasar desapercibido, desarrollarse discretamente

to be present or active but not widely known or noticed

:
The new startup has been bubbling under the radar for months, but now they're ready to launch.
La nueva startup ha estado bajo el radar durante meses, pero ahora están listos para lanzar.
Despite his talent, the artist has been bubbling under the radar, waiting for his big break.
A pesar de su talento, el artista ha estado bajo el radar, esperando su gran oportunidad.