The time processing is always crazy to me. When I applied for my citizenship in 2017 the average wait time was 12-18 months. Mine took exactly 90 days from the day I sent application to the day I did my oath.
When I did my adjustment of status back in 2009, I got the 10 year green card in the mail 45 days after I mailed my forms in. No interview, nothing (we did have the first interview and we had a child together)
Those were the good times.
Still haven't heard anything about my husbands case other than had the fingerprints taken. I am thinking we will have to have an interview since we didn't have one together for first GC. He just had it by himself at the US embassy in London.