Hay i have same situation like you, thou it seems evidence of financial support is not required for DV selectee filling I-485, i read one of the post of a successful person on this forum he said he went with I-134 but the officer didnt want it. Check on this attached I-485 instruction from the USCIS document. So we should be good even without I-134. Try ur level best to read the instructions documents from USCIS for each form ur filling they have useful information either. Regards an best wishes.
My initial instinct was to ignore this rather misleading post, but for the sake of those who decide to rely on what it says and are likely to get caught off guard (due to lack of inadequate preparation that they could have done otherwise), I decided to respond with links to at least two cases from the DV2018 AOS Thread where evidence of financial support were requested:
Interview Letter explicitly asks for an I-134 to be presented
Main selectee requested to complete an I-134 for spouse - while this is an unusual situation, it clearly supports the fact that the IO can request for an I-134 (and they clearly should if there’s concern about someone’s likelihood of becoming a public charge).
The IO’s refusal to collect an I-134 “one” selectee you’ve read about is no conclusive proof that document is not required. You need to be aware of the fact that each petition is dealt with on an individual basis, each FO/IO’s treatment of the petition they process is intuitive. There are other DV based AOS petitions outside of the two listed above where the I-134 also played a prominent role in their approval just so you know.