A good 1A/1B split in a full season would be something like 55/27 games. Translate that to this season, and it's 38/18. Given the compressed schedule, I would hope to see Allen somewhere in the high teens by the end of the season, assuming no injuries and both goalies playing well.
As a reference point, 17 games in a full season would give Price 65. He has played that many only four times in his career: 2010-11 (72 games, with Auld!), 2011-12 (65, with Budaj), 2014-15 (65, with Tokarski) and 2018-19 (66, with Niemi). 65 games (or equivalent) is a heavy load for any goaltender, and even more so for a 33yo in a compressed season.