Finally, a STW thread where I can claim some expertise.
We install keysafes for older people at work and only use the SUPRA C500. It is Secure by Design Police Approved and accepted by Insurers. I’ve seen the effort and hardware required for our engineers to force them open. If you had bad intentions you could just lob the power tools through the windows or drill out a door lock much quicker than the effort need to force the keysafe open
The code pad has number and letters. Just don’t use any variation of 19** as too predictable.
There are videos online showing people opening the C500 by feeling the resistance on the buttons but this has been designed out and is not an issue on the new ones.
There are other smart solutions around including bluetooth / wifi / NFC phone linked, increasingly these are secure and I suspect there are now also other Approved by Design products but the Supra is well made, reliable and tough as nails.
I have one outside my house.