I got an electronic drum kit from Aldi. It works great, excellent beginner kit!

But it only has two toms, and if I keep up the hobby for years, I know I'm eventually going to want to upgrade. So when I decide to get some better gear, will I be able to keep using some of the old stuff? Will I be able to pick up a new module and an extra pad, and just plug it into the old pads and pedals?

I read online that some drum brands are compatible, but I didn't see anything about Aldi's Huxley drums and what brands they're compatible with.

Thanks in advance, I know musical instruments are a niche technology, but this is the best community I could find.