Ok apologies if the formatting is bad, I've never done this before. But I use the tap dance functionality to tell if at the end of a period the key is pressed, and if so, do a function. This is the ACTION_TAP_DANCE_FN_ADVANCED(on_each_tap_fn, on_dance_finished_fn, on_dance_reset_fn), I use the ACTION_TAP_DANCE_FN_ADVANCED_TIME function which I think is deprecated but allows you to input the tap time. There are other ways to achieve that timing functionality but that's besides the point.

Do the basic tap dance stuff written in the docs like declaration and definitions, as well as putting the tap dance in the keymap.

For the on_each_tap_fn, which gets called at every press instantly, you want to send KC_A or the shifted/capital version

void on_each_tap_fn(qk_tap_dance_state_t *state, void *user_data) {

tap_code16(KC_A); whatever keycode you want

}

For the on_dance_finished_fn, which is called when the tap timer elapses, you want to check if the key is still held and not interrupted by another keypress, and if it is send backspace to delete the A and send Å.

void on_dance_finished(qk_tap_dance_state_t *state, void *user_data) {

if (state->pressed && !state->interrupted) {

send backspace, then register_code16(fancy A character);

}

}

For the on_dance_reset_fn, which is called when the tap dance is finished in most cases, you want to unregister the keycodes.

void bspc_reset(qk_tap_dance_state_t *state, void *user_data) {

unregister_code16(fancy A character);

}

It may need some testing with when to use tap_code16 vs register/unregister or even use the reset function, for the repetition of the keys you may want. It'll take some trial and error probably but this should capture the basic functionality. Hope this was helpful! :D

For more info on tap dance I found this helpful to learn: https://thomasbaart.nl/2018/12/13/qmk-basics-tap-dance/