I don't think that touch lib works with a 4.0. I could never get it working. Is you display's touch SPI based (had for me to guess with the pins stated above)? If it is SPI based, this lib is very good
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Not sure what buzzer you are referring to but these are what I've used.
https://www.amazon.com/gp/product/B01GJLE5BS/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Just send a pwm to them of a frequency of your...
Yep, I found a typo in the lib where I had SetItemValue and SetAllColors but it should have been setxxxx. I have fixed the examples, but as mentioned just change the ino and change Setxxxx to setxxxx
Bad news is it...
Can you post a link the the displays, and maybe a few screenshots? I've used maybe 30 ILI9341 (2.4 and 2.8) displays and never had an issue. All my projects involve drawing graphics and fonts.