Zoom customer support said the issue was my amplifier and I should contact the company.
I replied back and repeated my request that I need more audio gain from Zoom running on my iPad.
Zoom replied back and “suggested I use the volume controls on my iPad”. This is an excellent suggestion. I wonder why no else suggested it. My current volume setting might be at 50% and maybe much lower. I do not know. I will test it tonight during my Zoom session. I hope this works. We will see. Thanks.