[unknown] When copied as _main.pd to the IDE, the right inlet disappears.
don't worry about the representation: unused inlets/outlets on the right are just an inherent design flaw of the visualisation, but that in no way affects the processing done in Pd, which should exactly match the one you experience running Pd on your computer.
[unknown] error: select: no method for 'bang'
that is normal also on Pd: you shouldn't send a bang into [select]

[unknown] s, but am unable to attach either png or jpeg for some reason. Using Edge browser.
They should work if they are smaller than 2MB.
The issue you are having is that [delay] outputs a bang after the set time. If you send it a float, that will change the delay time, but still send out at bang at the other end. You may want to look at [pipe] to delay messages instead. In this case, what you really need is a debouncer. That can be done with [pipe] again, e.g.:
[r bela_digitalIn12]
|
[clear, $1(
|
[pipe 5]
|
[sel 0 1]
// etc
or using some of the examples that ship with Bela , e.g.: PureData/samples-record:

or the abstraction bela_debounce from PureData//talk-back:
