Got it! It's good that at least 2 survived! It's not a big loss - 1 plant in vegetation.
Now you need to get some nutrients and a root stimulator from some brand... choose which nutrients you'll be growing with... organic or mineral. But you need the root activator right now, because after transplanting it will reduce stress and quickly help the plant grow roots in the new pot size!
Try to get nutrients from a popular and well-known brand, so it will be easier for you to feed and understand, and make sure the bottles have feeding charts. So it will be easier for you in the future! 👆
For now, what you can do is water around the plant with water at a pH of 6.2 for soil.
Watering around the plant - that's important! So the roots grow wide in search of moisture!!! Don't allow the soil to become overly saturated! Keep an eye on its condition! 👆
In watering, it likes "acidic" water, so you also need 2 devices: a pH meter and a ppm meter. So you can understand what your acidity and salinity are in the soil! 👆
The price for the devices is $20 for both! 👌
Good luck, friend! ✊😇