WordPress Spam Plugins
I haven’t fleshed this out, looking for recommendations.
Simple Cloudflare Turnstile – CAPTCHA Alternative
WP Armour
https://wordpress.org/plugins/honeypot/
WordPress Content Filtering Plugins
Cleantalk
Just be aware that Cleantalk does have some caveats Cleantalk Caveats, Limitations and Issues - Managing WP
https://cleantalk.org/