[grammar] (now + past tense) Her dream came true now
[grammar] (now + past tense) Her dream came true now.
the original sentence - [Being a doctor was a dream for her. Her dream came true now.]

My understanding
1. (based on definition below) now(=then) [refer to the moment in the past] + past tense Verb
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{from dictionary defination} Now --- 5. ADVERB, In stories and accounts of past events, now is used to refer to the particular time that is being written or spoken about.
https://www.collinsdictionary.com/dictionary/english/now
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2. Question: In the sentence, [Now=then in the past]. Could it be possible that the sentence(or Now) has other explanations in this sentence, like [(Now =in present time or recently)+ (refer to past event-(Ved) ]?

Because based on the dictionary below, if Now = recently, its position is before Verb, which doesn't fit in this sentence. Or the usage/meaning is not so strict that it can also apply in this sentence?
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{from dictionary) Now - 4. ADVERB [ADVERB before verb]
You use now to indicate that a particular situation is the result of something that has recently happened.
--
Any tips or suggestions are all welcome.
If there is anything wrong in my opinion or understanding, please help to correct it.
Thank you for your attention.

Question

[grammar] (now + past tense) Her dream came true now
[grammar] (now + past tense) Her dream came true now. 
the original sentence - [Being a doctor was a dream for her. Her dream came true now.]

My understanding
1.   (based on definition below) now(=then) [refer to the moment in the past] + past tense Verb 
----
   {from dictionary defination} Now ---  5. ADVERB, In stories and accounts of past events, now is used to refer to the particular time that is being written or spoken about.
  https://www.collinsdictionary.com/dictionary/english/now 
---
2. Question: In the sentence, [Now=then in the past]. Could it be possible that the sentence(or Now) has other explanations in this sentence, like [(Now =in present time or recently)+ (refer to past event-(Ved) ]?

Because based on the dictionary below, if Now = recently, its position is before Verb, which doesn't fit in this sentence. Or the usage/meaning is not so strict that it can also apply in this sentence?
--
  {from dictionary) Now -  4. ADVERB [ADVERB before verb]
You use now to indicate that a particular situation is the result of something that has recently happened.
--
 Any tips or suggestions are all welcome.
 If there is anything wrong in my opinion or understanding, please help to correct it. 
 Thank you for your attention.

Answer

Her dream had been to become a doctor, and now it had come true. 
That is the correct grammar. 
Or: her dream was to become a doctor and now it had come true.

Answer

Dear Alyssa: Thank you for the informative and detailed explanation. It has helped me understand the usage of "now" more.
However, I have tried but can't find any problem in the original sentence or in my opinion. If it is fine for you to point it out, please help to do it.

Answer

“Her dream was=(past tense) to become a doctor. Now it has come true”- the ‘now’ in this sentence is to indicate a situation is the result of something that has recently happened.
And the shortened version
“Her dream had now come true” -  this ‘now’ is talking about a something that has recently happened. As a native speaker of English, I wouldn’t personally use the word ‘now’ in this sentence, it feels unnatural. I would simply say- “Her dream has come true” which still implies this has happened recently.