Unresponsive left click acting as right click on MacBook 2017

OP wrote " It seems to be fine when I’m on safety mode so I feel that it is a software issue. "

Probably some type of Third Party Software that has been installed on the computer

Since this issue does Not Occurring in Safety Mode - whatever software that is causing this issue in Not Loading in Safe Mode

Respectfully, suggest

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Is this the trackpad or a mouse?

BDAqua wrote:

Is this the trackpad or a mouse?

Based on the post it seems it's both. First on the trackpad, then tried an external mouse.