I haven't seen these links mentioned here often, if at all so I thought I would post them. You CAN prequalify for the Merrick Double your limit. Here is another I found, Indigo.
*Correct me if these are not "True" pre approvals.
Merrick Bank Double Your Line
https://onlineoffer.merrickbank.com/?code=UQS18320717334586897508
Indigo Card
https://www.indigocard.com/get-your-platinum-card?mmcid=IAAG01216011001A200017127605?2309
As of 5/2021 EX8: 616 | TU8: 665 | EQ8: 662
First Premier $700 | Capital One Secured $500 | Discover It $1,000 (formerly secured)
Capital One Quicksilver $400 | Credit One Platinum $300 | Victoria's Secret $200
Express Next $500 | Williams Sonoma Store $400 | Brylane Home $250 | Chime Credit Builder NPSL
Walmart World Mastercard $300 | Aspire Mastercard $500 | Cerulean Mastercard $750
CFNA Bosch Car Care $800 | First Premier no AF $700 | Avant Mastercard $300 no AF
