But you could particularly look at para 7 on page 5.
I'm highlighting a few bits of that para for space reasons (my bolds), but suggest people do click and read it all.
Main powers in connection with withdrawal
7 Dealing with deficiencies arising from withdrawal
(1) A Minister of the Crown may by regulations make such provision as the Minister considers appropriate to prevent, remedy or mitigate—
(a) any failure of retained EU law to operate effectively, or
(b) any other deficiency in retained EU law,
arising from the withdrawal of the United Kingdom from the EU.
(2) Deficiencies in retained EU law include (but are not limited to) where the Minister considers that retained EU law—
...
(4) Regulations under this section may make any provision that could be made by an Act of Parliament.
...
(6) But regulations under this section may not—
(a) impose or increase taxation,
(b) make retrospective provision,
(c) create a relevant criminal offence,
(d) be made to implement the withdrawal agreement,
(e) amend, repeal or revoke the Human Rights Act 1998 or any subordinate legislation made under it, or
(f) amend or repeal the Northern Ireland Act 1998 (unless the regulations are made by virtue of paragraph 13(b) of Schedule 7 to this Act or are 15 amending or repealing paragraph 38 of Schedule 3 to the Northern Ireland Act 1998 or any provision of that Act which modifies another enactment).
(7) No regulations may be made under this section after the end of the period of two years beginning with exit day.
(8) The reference in subsection (1) to a failure or other deficiency arising from the withdrawal of the United Kingdom from the EU includes a reference to any failure or other deficiency arising from that withdrawal taken together with the operation of any provision, or the interaction between any provisions, made by or under this Act.
To my untutored eye, the early subsections appear to have very broad application, while the subsections (6) and (8) attempt to rein the powers in a bit. But someone experienced in legislation might well have something different to say.