Curbside delivery platform/orchestration for small businesses to manage picking orders for customers and getting them to them when they arrive at brick and mortar parking lot. Could probably be a Shopify app if one like it doesn’t already exist.
It's not too late. The pandemic will likely go on in some form for at least another year, if not indefinitely. The lasting effects will go on for years or decades (people will work from home, order food and grocery delivery, etc at higher rates than before the pandemic).
New collaboration tools (something beyond just conference calls/chat). Also realized the sorry state of some agile tools, and I think there’s little creative thinking going on in that space.
Resale/checkout automation software to use on big retailers for hot items that are always oos. Easy first million