Is communication using tx/rx from an arduino to mkr1010 the same as any other serial communication?
I ask because I can't find any tutorials or info on connecting an arduino to mkr1010, but there are plenty on connecting one arduino to another.
The most important thing to keep in mind is that the MKR WiFi 1010 uses 3.3 V logic levels. If you connect the MKR WiFi 1010's RX pin directly to the TX pin of an Arduino board that uses 5 V logic levels (Uno, Nano, Mega, Leonardo, etc.), then you will damage the MKR WiFi 1010. You need to use a voltage divider or level shifter module to change the 5 V logic level to 3.3 V.
Pins 13 and 14 on the MKR WiFi 1010 are Serial1.
Other than that, all the information from the tutorials will apply.