If you've used the Aqua and it works well for you, it should work just as well outside. Using a laptop running Karafun plugged into a projector and extra speakers means the Aqua is only being used as a mixer.
You didn't say what speakers you'd pick up for added volume. I'd recommend 1 or 2 of these for something small
https://smile.amazon.com/Rockville-RPG8BT-V2-Bluetooth-Wireless/dp/B0881VBHDG
Any upgrade to replace the Aqua would be a mixer like these https://smile.amazon.com/BEHRINGER-XENYX-1202FX-3-pin-Black/dp/B000J5Y214
https://smile.amazon.com/dp/B07XC3BHTL
And for mic upgrade I'd recommend something like this.
For mics - I have these and they work great and available in Canada but if you look at some of the other posts here you might find something cheaper
For mixer - I have a similar Behringer mixer and I'm very happy with it. You can get something cheaper but I prefer a mixer with good effects for the vocals and it's hard to find anything cheaper.
https://www.amazon.ca/Behringer-1202FX-12-Input-Multi-FX-Processor/dp/B000J5Y214
For speakers - have a 10" version of this Rockville speaker and I'm happy with it.
https://www.amazon.com/Rockville-BPA8-Professional-Speakers-Bluetooth/dp/B01CZH0PWS
But I see it's not really available in Canada so you might want to go with one or two of these.
https://www.amazon.ca/Alto-Professional-TX208-Loudspeakers-Performance-Driven/dp/B07CKDCF99
You'll also need some cables to connect everything together.
https://www.amazon.com/Cable-Matters-2-Pack-Microphone-Feet/dp/B00KO8VY4O
https://www.amazon.com/Mugteeve-Adapter-Balanced-Monitors-Interface/dp/B08LFW8BZK
TV or Ipad audio output into analog mixer
https://smile.amazon.com/BEHRINGER-XENYX-1202FX-3-pin-Black/dp/B000J5Y214
Wireless mics output into analog mixer
Output of analog mixer into powered speaker
https://smile.amazon.com/Mackie-Thump12A-1300W-Powered-Loudspeaker/dp/B073V7MKQZ
Here is what I would recommend.
mics
https://www.amazon.com/innopow-80-Channel-Microphone-Continuous-WM-333/dp/B0749L15PF
mixer
https://www.amazon.com/BEHRINGER-XENYX-1202FX-3-pin-Black/dp/B000J5Y214
speaker(s)
https://www.amazon.com/Mackie-Thump12A-1300W-Powered-Loudspeaker/dp/B073V7MKQZ
cables
https://www.amazon.com/Cable-Matters-6-35mm-Inch-Male/dp/B00KO8VZ1Q
https://smile.amazon.com/Hosa-CMP-159-Stereo-Breakout-Cable/dp/B005HGM1D6
https://smile.amazon.com/Cable-Matters-2-Pack-Microphone-Feet/dp/B00KO8VY4O
https://smile.amazon.com/Anker-Aluminum-Pixelbook-Compatible-Thunderbolt/dp/B07THJGZ9Z
mic covers
https://smile.amazon.com/Handheld-Microphone-Windscreen-Anti-Roll-Device/dp/B07C15R65M