When i Epic reincarnate .. i will get back a reaper first time bonus completition ?

If i decide to epic reincarnate .. my toon goes to lvl1 to lvl20 and then i must gain the xp to reach again lvl30.
Each quest i do at lvl21,22..etc at reaper difficulty, it's valid as first time bonus ?

Also, once at lvl 30, if i do a quest i will get a 'first time bonus' ?

or i must do a True Heroic Reincarnate only to have that ?

please help me to understand. thanks

Nope. As the Wiki's Epic Reincarnation page says, first time bonuses don't reset upon ETR. You need an ITR, HTR or RTR to reset first-time bonuses, including Favor

Why? Well, under the hood, an ETR gets you to 20 via a LR+0. If LRs reset first-time bonuses and favor, those hearts would be significantly more expensive