Q1: When I use this card's Delay effect to digivolve into a Digimon card with {{EffectLinkArchetype|Gallantmon}} in the hand, can it digivolve regardless of its digivolution requirements?
No, this card's Delay effect does not allow ignoring digivolution requirements, so you can only digivolve into a card that meets the digivolution requirements.
Crimson Savior BT17-096 U [Main] You may play 1 [Guilmon] or [Takato Matsuki] from your hand or trash without paying the cost. Then, place this card in the battle area. [All Turns] When an opponent's level 5 or higher Digimon is played, <Delay> • 1 of your Digimon may digivolve into a Digimon card with [Gallantmon] in its name in the hand without paying the cost. --- [Security] Activate this card's [Main] effect.
Crimson Savior BT17-096 U [Main] You may play 1 [Guilmon] or [Takato Matsuki] from your hand or trash without paying the cost. Then, place this card in the battle area. [All Turns] When an opponent's level 5 or higher Digimon is played, <Delay> • 1 of your Digimon may digivolve into a Digimon card with [Gallantmon] in its name in the hand without paying the cost. --- [Security] Activate this card's [Main] effect.
Crimson Savior BT17-096 U [Main] You may play 1 [Guilmon] or [Takato Matsuki] from your hand or trash without paying the cost. Then, place this card in the battle area. [All Turns] When an opponent's level 5 or higher Digimon is played, <Delay> • 1 of your Digimon may digivolve into a Digimon card with [Gallantmon] in its name in the hand without paying the cost. --- [Security] Activate this card's [Main] effect.
紅蓮の救世主 BT17-096 U 【メイン】自分の手札/トラッシュから、「ギルモン」/「松田啓人」1枚をコストを支払わずに登場できる。その後、このカードをバトルエリアに置く。 【お互いのターン】Lv.5以上の相手のデジモンが登場したとき、≪ディレイ≫。 • 自分のデジモン1体を手札の名称に「デュークモン」を含むデジモンカードにコストを支払わずに進化できる。 --- 【セキュリティ】このカードの【メイン】効果を発揮する。