Bismillah, yes I do understand your frustration when students do not ask for help. I used to be a teacher’s assistant way back when. . . teaching pre-k thru 5 graders. It’s hard sometime to express your concerns when students cannot express if they need help or not. It’s pride that stand in the way of asking for help.
I have seen students hold back because they are afraid of their full potentials that they have inside of them. Only you asked for those who are not afraid will come and seek help. You are doing what is right by extending yourself to those that are in need of help but still keep on reaching out to those who do not have the strength to ask for help, or get help. Please, insists that if any students need help come to open office hours and bring someone that also needs help. Students like to come alone or in pairs rather in pairs to feel less embrass by other students that think they are slow in homework materials.
You can try to hang out bright color posters for everyone to see if they need help come the office. This will catch their attention when passing through the halls.
Keep up the great deed because they will come, Alhamdulillah!!!!

This is sooo true. What a nice reflection alhamdulilah. I was reading a handbook for teaching assistants at my university and it was saying how those students who really need help never come to office hours. It reminds me of myself. And then when I think of the Prophet pbuh and how he was asked about why he prays so much and he said “should I not be grateful”. The Prophet pbuh was forgiven for his sins and yet asked for forgiveness several times a day. We are far off from the status of the Prophet pbuh and thus it is more dire for us to ask for forgiveness and to pray more and yet we don’t. Deep reflection. mA