Hi @Saiyato,
I am using some of your plugins on Buster since long time, updating some of the node modules.
Here the script I use for installing them
sudo apt -y install build-essential
cd ~
wget http://plugins.volumio.org/plugins/volumio/armhf/system_controller/gpio-buttons/gpio-buttons.zip
mkdir ./gpio-buttons
miniunzip gpio-buttons.zip -d ./gpio-buttons
cd gpio-buttons
volumio plugin install
## when installation is finalized, press CTRL+C ##
cd /data/plugins/system_controller/gpio-buttons/
npm install --save onoff@6.0.0
sudo apt -y install build-essential
cd ~
wget http://plugins.volumio.org/plugins/volumio/armhf/system_controller/gpio_control/gpio_control.zip
mkdir ./gpio_control
miniunzip gpio_control.zip -d ./gpio_control
cd gpio_control
volumio plugin install
## when installation is finalized, press CTRL+C ##
cd /data/plugins/system_controller/gpio_control/
npm install --save onoff@6.0.0
npm install --save sleep@6.2.0
sudo apt -y install build-essential
cd ~
wget http://plugins.volumio.org/plugins/volumio/armhf/system_controller/gpio_radio_buttons/gpio_radio_buttons.zip
mkdir ./gpio_radio_buttons
miniunzip gpio_radio_buttons.zip -d ./gpio_radio_buttons
cd gpio_radio_buttons
volumio plugin install
## when installation is finalized, press CTRL+C ##
cd /data/plugins/system_controller/gpio_radio_buttons/
npm install --save onoff@6.0.0