is it bad to have my macbook connected at all time?

I believe it is fine.

I keep my MacBook plugged into the power adapter whenever possible.

Refer to this page: https://support.apple.com/en-us/HT212049

macOS Big Sur learns our usage pattern and optimizes battery health.

Based on my experience, when the battery is fully charged it will automatically switch the power source to the power adapter, so it will not drain the power from your battery.

Also, refer to this page to learn more about optimizing battery life: https://support.apple.com/en-us/HT204054#optimize

asjuancho Said:

"I would like to know if it is bad for the battery of the MacBook pro to have it connected at all time."

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Your question is ambiguous. The answer depends on the scenario.

So, give an example of how you want to use it.

asjuancho Said:

"I would like to know if charging my MacBook at all time is bad for the battery. For example, can I charge it all night? I don’t want to affect the battery of the MacBook negatively."

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Based on Prior Experience:

It may or may not affect it. For me, I always have it plugged in, when using it, and not plugged in when not using it. I've had this 5K Mac for 3 years - and never have I had any power issues(though all computers are always prone to failure). No: Do not charge it all night. If you have pets, then they may run around, or you may trip on it. I place it in one of these, when not using it: Twelve South BookBook V2 for 16" MacBook | Vintage Full-Grain Leather Book case/Sleeve with Interior Pocket - Amazon