Minutes should be made available to the public within (the maximum) 30 days whether they are ratified or still draft. Good practice is not to actually wait 30 days (or often longer) before publishing, to do so is lazy and inefficient.
Doesn’t hurt to highlight the obvious inaccuracy to the clerk in advance of the ratification but if, as you seem to indicate, you think they have brushed you off, then at the meeting where there should be a vote to accept as accurate and formally ratify the minutes, raise a point of order (if necessary) or just interject with a statement of fact - Cllr X left the meeting and this should be recorded in the minute.
Despite the (personal observation) that clerks tend to get hissy when minutes have to be amended, if you present a matter of fact then there should be a vote (of the council) to accept or reject the amendment. The clerks opinion is irrelevant - they exist to serve not command the council.