Q1: If this card's All Turns effect is activated and two Digimon including the leaving Digimon digivolve, does the digivolved Digimon leave the Battle Area?
No, they do not leave the Battle Area. DNA digivolves digivolve as a new Digimon, so it is a different Digimon than the one that leaves.
Lv.5 Dinobeemon BT20-074 U Ultimate | Free | Mutant [DNA Digivolve] Purple Lv.4 + red Lv.4: Cost 0 [On Play] [When Digivolving] You may return 1 Digimon card with [Imperialdramon] in its name or the [Free] trait from your trash to the hand. [All Turns] When any of your [Dinobeemon] or [Paildramon] would be returned to hands or decks, 2 of your Digimon may DNA digivolve into [Imperialdramon: Dragon Mode] in the hand. --- Inherited: [Your Turn] This Digimon doesn't activate [Security] effects on Option cards it checks.
Lv.5 Dinobeemon BT20-074 U Ultimate | Free | Mutant [DNA Digivolve] Purple Lv.4 + Red Lv.4: Cost 0 [On Play] [When Digivolving] You may return 1 Digimon card with [Imperialdramon] in its name or the [Free] trait from your trash to the hand. [All Turns] When any of your [Dinobeemon] or [Paildramon] would be returned to hands or decks, 2 of your Digimon may DNA digivolve into [Imperialdramon: Dragon Mode] in the hand. --- Inherited: [Your Turn] This Digimon doesn't activate [Security] effects on Option cards it checks.
Lv.5 ディノビーモン BT20-074 U 完全体 | フリー | 突然変異型 〔ジョグレス〕紫Lv.4+赤Lv.4:コスト0 指定のデジモン2体を重ね、アクティブで進化する 【登場時】【進化時】自分のトラッシュから、名称に「インペリアルドラモン」を含むか特徴に「フリー」を持つデジモンカード1枚を手札に戻せる。 【お互いのターン】自分の「ディノビーモン」/「パイルドラモン」が手札/デッキに戻るとき、自分のデジモン2体で手札の「インペリアルドラモン:ドラゴンモード」にジョグレス進化できる。 --- Inherited: 【自分のターン】このデジモンがチェックしたオプションカードの【セキュリティ】効果は発揮しない。