I'm also worried about this... and I'm wondering if there's any chance they'll complete the renovations early (We're planning a trip for the first week of April).
Here's the statement on the DVC site:
2023 Refurbishments
The feature pool and whirlpool spas at the adjacent Disney’s Contemporary Resort will be closed for refurbishment from January 9, 2023 through early April 2023. The following will remain open for your enjoyment:
*Bay Cove Pool
*The leisure pool and water play area at Disney's Contemporary Resort
The Bay Cove Pool is the DVC Bay Lake Tower pool. So it does sound like they're offering Contemporary resort guests access to the Bay Lake Tower pool.
The "Bay Pool" is the contemporary pool closer to the lake... but the "Bay Cove Pool" is the DVC pool. - yeah, it's easy to get these confused.
Yes, the Bay Cove Pool is the BLT pool and will remain open to DVC members and guests at BLT - per the statement you quoted from the DVC site.
Guests at the CR do not have access to the Bay
Cove Pool, they have access to the Bay
Lake Pool which is the other pool at CR - here’s what the statement says on the Contemporary Resort website
https://disneyworld.disney.go.com/recreation/contemporary-resort/pools-contemporary-resort/:
From January 9, 2023 through early April 2023, the feature pool and whirlpool spas will be closed for refurbishment. The water play area and Bay
Lake Pool will remain open for your enjoyment. You may see and hear construction noise while this refurbishment is underway, but you should not hear noise from Guest rooms between dusk and 9:00 AM. We apologize for any inconvenience.
So, no, guests at CR are not allowed to use the Bay
Cove Pool at BLT. They’re limited to the Bay
Lake Pool at CR.
Way back when BLT was being designed, the person who named the BLT pool wasn’t thinking!