The follows are interesting.
Former contestants seem to be treated slightly better by TPTB at The Voice than at American Idol.
Regardless, it's probably better to wait a few years between shows. This soon, Grace (TV s23 runner-up in spring 2023) would likely get more viewer complaints about entering another televised competition.
Here are stats on 7 females who auditioned for The Voice and then American Idol.
Adanna Duru TV s3 (fall 2012) battles / AI s14 (2015) Top 11
Sonika Vaid TV s4 (spring 2013) no chair / AI s15 (2016) Top 5 [after being saved by judges at Top 8 and Top 6]
Shelbie Z TV s5 (fall 2013) live playoffs / AI s15 (2016) Top 24
Wé Ani McDonald TV s11 (fall 2016) third place / AI s21 (2023) Top 5
Megan Danielle TV s18 (spring 2020) Top 9 semifinalist / AI s21 (2023) runner-up
Mia Matthews with Worth the Wait TV s19 (fall 2020) live playoffs / AI s22 (2024) Top 10
Hailey Mia TV s21 (fall 2021) fourth place / AI s22 (2024) Top 24