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This is a crypto wallet password recovery service after all, meaning that at any given time, they potentially have access to the contents of the wallets whose password they may have recovered so it's not very safe to bring outsiders to the lab where the recovery is done since you can never really tell who is who these days, the person allowed into the lab might be there to sabotage there place one way or the other and such an act can be bad for business.
Before anyone is granted access to the lab, there must be some procedures that must be met, likewise, employment of staff as well, because they just can not be allowed in without any prior notification of their intentions. A lab is a very sensitive place to be, irrespective of the nature of the engagement done there. This is why some organisations always put up caution signs before the entrance for anyone approaching to be aware before they come in, so they are not taken unawares.
I think the fact is where you made mention of implement procedures to ensure only authentized personnel can enter in the lab, i the company should also consider posting caution signs to alert individuals of the sensitive nature of the lab this could also be of help too, pulses always ensure throughful screening of staff and visitors before gaining access to the lab. Prioritizing lan security services that can protect sensitive information assets and personal data of clients