In Poland basketball is getting more and more popular and we feel the lack of coaching.

coaching 是动词 coach 的现在分词形式。coach 作为动词时意思是"指导、训练"，指对运动员或运动队进行专业指导和训练。 coaching 在这里指"教练指导"这个行为或过程，强调专业训练和指导的持续性活动。