Why did my plant get yellow leaves after repotting?

You probably did not damage it. Yellowing lower leaves in the week or two after a repot is one of the most common things in houseplant keeping, and it usually sorts itself out.

The likely cause

Repotting always breaks some of the fine root hairs that do most of the actual water uptake. Until those regrow, the plant cannot supply every leaf it was supporting before, so it makes a decision and sheds the oldest ones. That is transplant shock: a managed retreat rather than a sign of harm. There is a second possibility worth ruling out, though. A much larger pot holds far more water than a small root ball can drink, and mix that stays wet turns ordinary transplant shock into root rot.

How to fix it

1. Water less, not more. A smaller root system in a bigger volume of soil needs less water than it did before, not extra. Check the mix and wait until it is dry.
2. Keep everything else steady. Same spot, same light, no feeding while it recovers. One change at a time.
3. Support the recovery. Once new growth appears, Kelp It Real at the feeding-chart rate supports plants working through stress.

What to expect

Yellowing should stop within two to three weeks, with new growth following. If it keeps climbing up the plant and the mix stays wet, stop and check the roots.