Can I come to Canada on Visiting Visa while Super Visa is in process?

[PKM103]

Hi Cohen Immigration and all,

Please help me here. I booked flights for my mom, she is coming to Canada on Visiting Visa on June 26. I just got my eCOPR and thinking to apply Super Visa for my mom. Please reply to my concerns below,
1. Can I apply for SuperVisa using eCOPR?
2. If I apply for Super Visa now(Outside Canada) and received approval while my mom in Canada, will it be okay?
3. After the approval, how can we get the stamping done while she in Canada?

Guide me the best way to do in this situation.

Thanks in advance!