You feel your child prefers the tablet to you

That this hurts tells me how much you love them, so let me ease the wound first. The tablet is engineered to be more compelling than you can be — a thing made by many to be maximally captivating, endlessly novel, in ways no human parent can or should match, so your child does not love you less; they are pulled by a device designed to pull, and the preference is the measure of its engineered pull, not of their love. So do not try to compete; change the terms — you cannot out-dazzle it, so set limits so it is not always there to be preferred, and offer in the opened space the warmth and play and real world only you can give. And rebuild the pull of the real through presence — unhurried, fully-present, delighted time, which they may resist at first but which reasserts the deeper bond no device can replace, until, given the real thing consistently, they come to prefer it. Your presence is the one thing more nourishing than the tablet. How much of their day is on the screen now?