They go on to produce work containing these symbols in varying degrees of modification for so many reasons, its just bloody pointless at this stage to keep these locked away.
- ISO 3758
- ISO 3864
- ISO 7000
- ISO 7001
- ISO 7010
and more.
You can even browse them all... https://www.iso.org/obp/ui/#search yet you cannot use them without paying.
We live in a world plastered with these symbols, the very purpose of which is to be an international agreed upon symbolic language for safety and utility, yet we lock them away behind a nominal paywall that cannot possibly be a lucrative revenue stream... its just daft bordering on hypocritical.
Id go so far as to say these symbols they belong in the open standardised like Unicode, for all to use and easily available for clear compatibility, delegated from ISO to another body that can be more open if their hands are tied for some reason.