If you emailed your job application you need to make sure it was actually received.

Even if it was via an online form it still has to be emailed and can end up in a junk or spam folder.
A good recruiter will routinely check their junk mail folders as maybe 1 in 15-20 applications will find their way there, but you can’t risk relying on that.
Just pick up the phone and say that you want to confirm receipt as you’ve had previous issues with your email being screened as spam – you’ve no idea why, but it happens! That way you confirm it was received and you get your application noticed.