Just got schooled by an AI.
According to Wiktionary:
(UK) IPA(key): /ˈstɹɔːb(ə)ɹi/
(US) IPA(key): /ˈstɹɔˌbɛɹi/
...there are indeed only two /ɹ/ in strawberry.
So much for dissing on AIs for not being able to count.
Also, the LLM is just Yes Manning. OP gave it the 'rr' counts as a single 'r' answer with a very loaded question