Disk soap is definitely not something you want inside your MacBook, especially one as tightly packed as the M3 Air. Dish soap residue can be sneaky, sticky, and potentially corrosive over time, especially if moisture is still involved.
Please be aware that this may not be something you can completely do yourself as it may require that you will need to open your laptop to remove any traces of this soap. This is best done by either Apple or an Apple Authorized Service Provider.
The important thing to do now is to completely power down your laptop and stop using it until you can get this resolved. Continued use will guarantee that will induce additional damage with added cost to repair.
If you have no option but to do this yourself, you may need to fully disassemble your laptop in order to gain access to where the soap has entered inside. How to go about doing so is beyond the what we can assist you with other than to let you know that there are sources on the Internet on the "step-by-step" to do so.
Again, I can only advise you that your best course would be to have an Apple Technician inspect your Mac and provide you with your options. The inspection should not cost you anything.